tried to ask out a few, but I barely knew them (with the exception of their names). After class, we seldom see each other, and are busy with our schoolwork and existing friend groups. I should take the time to get to know them, but don't have time to do so. I also don't know when is the appropriate time to compliment them (say, "hey, you're cute, let's get to know each other"), without coming off as creepy. My approach is also weak, as I wait until after class and start off with a "hey" or ask a question related to the class.

This ends up creeping out the girls or scaring them off.

TLDR : I dont know what to do.