Exactly how much blood..?

So I'm 18 and and virgin, basically got no sex ed ever in my life (parents are conservative and when I transferred schools apprently I missed the sex ed unit 😒 not that they taught anything important in school anyway) but I've always heard/read from others that when having sex for the first time, I should expect to see blood. This is out of genuine curiosity, but exactly how much blood should I be expecting? Is it similar to spotting? First day of getting your period? CRIME SCENE?! (ok the last one is obviously a joke) but please help satisfy this girl's curiosity 😂