I practice drawing to enter art collaege, but recently, I cannot feel that my skill improve.

My friends who draw on my sidalongside me maybe passed the exam because they were skillful.

I despairfeel hopeless when I look at them.

"Hopeless" is probably more natural, but you can also say "I feel despair..."

tThe dDrawing tTest

Title capitalization rules

I am practiceing drawing to enter art collaege, but recently, I cannodon't feel that my skill is improveing.

Because it is something you are actively doing, you would say "I am practicing" instead of "I practice"

My friends who draw on mythe side maybe pass the exam because they weare skillful.

I was not sure what you meant by "on my side." Maybe you meant "on the side" to say it is a skill they practice often, though this also implies they get paid for it (such as through art commissions).