How to get over fear/discomfort with tubes?

I'm fine with needles, blood, vomit, feces, etc, but seriously freaked out about things like catheters, NG tubes, etc. to the point of almost passing out when seeing them be inserted/removed.

I really want to pass my nursing program, and don't have to worry about passing these skills for quite a few months, but I was wondering if anyone had any similar experiences of having a fear about something and overcoming it for nursing school?

All answers are really appreciated 🤎