Success is an amazing feeling in a person’s life.

Success involves sietting goals and trying to achieve ithem in a specific time.

As "goals" is plural, you say "them" (plural) instead of "it" (singular).
Success and goals are different conceps so it makes more sense to say "success involves" instead of "success is".

I firmly believe that, the most important part of goal setthings is that your goal should be something you are interested in and thas at has meaning for you.

FurthermoreAdditionally, you need to set a serious plan and, take an action, work hard and never give up when you face challenges, t. This will help you to improve your personality.

When writing a list in a sentence, only put "and" before the last word in the list.
"[word], [word] and [word]."

Therefore, weyou should organize your time carefully and do theyou best to achieve your goals, in order to feel comfortablentent.

Because you have used "you" earlier, the rest of the paragraph should be consistent and speak to the same audience.

With a successIn the course of pursuing a goal, individuals willcan discover their true abilitiesy and learn new skills.

ItGoal-setting is a good way to havcreate a better future and improve yourself as well.

There are different types of success: success in your personal life, success, in your relationships, success, at work success, study, academic success and wealthfinancial success.

It sounds more natural to descibe the types of success this way.

Success is an amazing feeling in a person’s life.

Success is sietting goals and trying to achieve ithem in a specific amount of time.

I firmly believe that, the most important things is about your goal should be interested andis that you're interested in it and that it has a meaning for you.

This was a bit awkward and hard to rework. Here are a few options that are more natural:

- I firmly believe that being interesting in a goal that has meaning to you is most important.
- I firmly believe that the most important aspects of your goal should be interest and personal meaning.

Furthermore, you need to set a serious plan and take an action,. You need to work hard and never give up when you face challenges,; this will help you to improve your personality.

"character" fits better than personality

Therefore, we should organize our time carefully and do theour best to achieve our goals, in order to feel comfortable.

With a success, individuals will discover their abilities and new skills.

It is a good way to have a better future and improve yourself, as well.

There are different types of success: personal life success, relationships success, work success, studyeducational success, and wealthfinancial success.