Student or Learner
1) I didn't need to go to the library to checkout books in dermatology.
2) I didn't need to go to the library to checkout dermatology books.
3) I prefer to keep/maintain my culture.
4) I won't feel better about myself if I wear tight or silly dress, rather I prefer to wear according to my taste/who I am.
Thank you so much taking the time to answer my questions.
You need the verb check out. Checkout is a noun.
'. . .a tight or silly dress.'