I'll take Tthe high - -speed railway tomorrow,now only take it feeling no dizzy.

You can say "high-speed railway" or "high speed railway", but if you're going to use the hyphenated version, you shouldn't have spaces around the hypens. This is because "high-speed" with a hyphen is a single compound word.

Commas on the other hand have no spaces before, but do have a space after.

"now only take it feeling no dizzy" I'm not quite sure what you meant here, but here's a few options:

"Nowadays I only take it when I'm not feeling dizzy" if you take the train when you're not feeling dizzy, but don't take the train when you are feeling dizzy.
"Now that I took it, I feel dizzy", if you started feeling dizzy while on the train
"I didn't take it today because I was feeling dizzy", if you're saying you didn't take it today because you were dizzy, but plan to take it tomorrow.

It's really uncomfortable to feel dizzy when taking a coachaking a coach when you feel dizzy.

Your version was grammatically correct also, but this way is more natural.

I coughed heavily last night and I don't know how todo it,it's deal with it, I'm feeling uncomfortable.

Uncomfortable describes your own feelings, so it's not something you would use the passive voice for.

"I don't know how to do it" implies you don't understand how to cough, which is probably not what you meant, so I guessed you mean "deal with it" which can mean either "endure it" or "make the cough go away" depending on context, both fit here.

I went to learn the seasons on a grammar website that onlinet friends told me about tonight.

"net friends" sounds a little outdated, like something people would say in the 90s.

I felt this way is fit me.

"is" doesn't combine with the basic form of verbs like this. You can use "is fitting for me", or go simpler with "fit me"

I thought I canould understooand it, but I can't use it yet.

"I thought" is past tense, so you want the next bit to be past tense too.

I would like usingto use it as a simple diary to write about my study and life.

For intentions, you can use "would like to". If you want to focus more on how it would make you feel, you could also use "would enjoy" instead of "would like to"

I'll take The high - speed railway tomorrow,now only take it feeling no dizzy.

I'm not sure what the second half of your sentence is supposed to be mean exactly. "I can take it now because I don't feel dizzy"?

I coughed heavily last night and I don't know how to do it, it's feels uncomfortable.

You don't know how to do what?

I went to learn the seasons on a grammar website that net friends told me about tonight.

The seasons like 夏、秋、冬、春? If that's what you mean, this is OK. If you mean something else, I'm not sure what you're trying to say.

Maybe you mean "tenses", like I am/I was/I will be?

I felt this way is fits (or "suits") me.

I still make many grammar and word mistakes when I write the articles in here.

I would like using it as a simple diary to write about my studyies and life.

I'll take The high - speed railway tomorrow,now only take it feeling no dizzy.

I'm not sure quite what you meant here, perhaps 'I'd take it, only I'm feeling dizzy' or 'I only take the high-speed railway so I don't get dizzy.'

I coughed heavily last night and I don't know how todo it,it'sit feels uncomfortable.

I felt this way is fit me.

I would like usingto use it as a simple diary to write my study and life.