[NSFW] I’m scared to have sex

Hi, 20F here. I grew up in a very conservative household where sexual intercourse is something to be done after marriage. My entire family has been passing down these ideas of conservatism and purity since I was a child ( don’t date until university, be friends for at least a year before agreeing to date, nothing beyond holding hands or a peck when dating). I don’t agree, and I do think that knowing sexual compatibility is important before a marriage, but I get scared whenever I think of doing it, especially since I still value sexual intercourse as a very intimate and trust-building experience. Every man I talk to seems to want to do it asap though, even the ones that seem sweet and wholesome; e.g. inviting me to their house on the first/second date.

My sister suggested that I should just wait until marriage, but then what if we find out not sexually compatible? I also haven’t had a boyfriend yet, so it’s all unexplored territory for me. How can I stop myself from feeling dread every time a man wants to be physically intimate with me? I’m just very confused on how to feel and what to do…