It sucks that you didn't get a proper sex education, but it's not too late to learn. No need to be embarrassed to ask questions, we won't judge (and if someone does judge it's just a random internet asshole that you'll never meet)
And when you get a partner USE A CONDOM
Here's the top 3 things that the Lemmy community loves the most:
So you're good
(jokes aside any aestethic choice will be attractive to some people and a turn off for others, so you might as well be whatever makes you feel good)