New year, new semester

I'm now a sophomore at a Nursing University. There once was a time that everything about my new school, status as an adult, and Nursing school was astonishing and awkward. Now I got my juniors* in school and it feels so cooool.

*did you mean 후배? If you did, then underclassmen or freshmen probably works better. "Now, there are new freshmen at school and it feels so coooool."

I got a scholarship this semester. As I cannot afford my tuition fee, I must study a lot and get another scholarship for next semester. Fortunately, studying nursing skills and medical things is really funny* and enjoyable. Haha

*funny = hahaha/ fun = having fun 
----------
congrats on the scholarship! goodluck on your next semester. :) 

your english level seems pretty advanced and it seems like you can write professional emails no problem so why don't you try writing in a more casual tone next time? It'll help in your everyday writing/texting/speaking lol