The speech, thate one the urban planning graduates gave yesterday, opened my mind to a new world.

すごい！

The urbanist can design the distribution of the buildings and how to make easier the transportation easier for people by designing better pavements, roundabouts, cycle paths and roads.

This career, unlike architecture, is focused on designing better cities.

For example, if the government wants to build a new city, an urbanist would design the metro lines to connect the key points of the city and find the bettedesign them in a way so that their distribution towill make it faster, easier and safer the transportation of thefor future citizens, t. The same is trucan be done for the roads and pavements.

Architects would design the buildings to make them more recsisteants to earthquakes, and to make them more aesthetic and space-ally pleasing and optimiszed for space as well.

I wanted to study architecture because I want to design a better and more ecological cities to reduce the pollution on the street and give more space to nature.

But nowNow, however, I have big doubts which are the following: Should I keepstay with my decision to study architecture?

Something that I like ofabout architecture is that you need to use your creativity to design better buildings, like in any other art.

But in Urbanism, however, is more technical and less creative.

I'm going to think very wellthoroughly over these two options.

Changing the subject, I'm going to try to find a new language partner, w. Wish me luck!

Good luck!

The speech, that the urban planning graduates gave yesterday, opened my mind to a new world.

TheAn urbanist can design the distribution of the buildings and how to make easier the transportation easier for people by designing better pavements, roundabouts, cycle paths, and roads.

This career, unlike architecture, is focused on designing better cities.

For example, if the goverment wants to build a new city, an urbanist would design the metro lines to connect the keypoints of the city and find thea better distribution to make transportation faster, easier and safer the transportation offor the future citizens, t. The same is true for the roads and pavements.

Architects would design the buildings to make them more recsisteants to earthquakes, and to make them more aesthetic and space-optimiszed as well.

I wanted to study architecture because I want to design a better and ecological cities to reduce the pollution on the street and to give more space to nature.

"a better and ecological city" would be correct, but since "cities" is plural, you need to remove the "a".

But now I have big doubtsome big concerns which are: Should I keep my decision to study aArchitecture?

For a sentence like this, using the word "concerns" sounds more natural than "doubts". I capitalized "Architecture" here because you have "Urbanized" capitalized in the subsequent sentence.

Something that I like ofabout architecture is that you need to use your creativity to design better buildings, like in any other art.

But in Urbanism is more technical and less creative.

I'm going to think very wellcarefully about these two options.

Since you are choosing between two options (i.e. "Architecture" and "Urbanism"), using the word "carefully" sounds more natural than "very well".

Changing the subject, I'm going to try to find a new language partner, w. Wish me luck!

The speech, that the urban planning graduates gave yesterday, opened my mind to a new world.

I think "that they gave yesterday" is a necessary and limiting qualifier to "the speech", and so shouldn't be separated from it by a comma.

The urbanist can design the distribution of the buildings and how to make easier the transportation easier for people by designing better pavements, roundabouts, cycle paths and roads.

Yours was not wrong, but I am suggesting what I think sounds more natural. "Make easier" sounds awkward to me.

This career uUnlike architecture, this career is focused on designing better cities.

Your version is not wrong, but I suggest that it is easier for the reader if you rearrange it so "unlike architecture" doesn't interrupt the main statement.
You could also put "unlike architecture" at the end instead of the beginning to accomplish this.

For example, if the government wants to build a new city, the urbanist would design the metro lines to connect the key points of the city and find the bestter distribution to make faster, easier and safer the transportation of the future citizens, the same is tru faster, easier and safer, and the same for the roads and pavementhighways.

We don't say "roads and pavements"--I don't even understand that phrase.
But we do say "road and highways", meaning both smaller roads and larger ones.

Architects would design the buildings to make them more recsisteants to earthquakes, and to make them more aesthetic and space-optimised as well.

I wanted to study architecture because I want to design a better and more ecological cities to reduce the pollution on the street and give more space to nature.

I don't know what "pollution on the street" means.
Do you mean "garbage on the street"?
Do you mean "pollution from the streets"? This would be a slightly metaphorical way to phrase that, because I'm sure the pollution "from the streets" is mostly from the vehicles traversing the streets rather than from the actual streets themselves.

But now I have biga major doubts which areis: Should I keep my decision to study architecture?

You only gave one doubt, so I changed it to singular.
"Big doubt" is not incorrect, but in writing and formal use, we tend to avoid the word "big". (I don't know why.)

Something that I like ofin architecture is that you need to use your creativity to design better buildings, like in any other art.

In written English, it is probably more common to say "as in any other art" rather than "like in any other art". I don't know why.

But in Urbanism is more technical and less creative.

I'm going to think very welldeeply about these two options.

Or:
I'm going to think hard about these two options.
Or:
I'm going to ponder these two options.