I cant talk to my mom about anything

she is super hard to talk to. she is also dead set on me marrying a christian man and waiting until marriage to have sex. i don't want to wait lol. i've also never had a sex ED since i was homeschooled and went to a school that only had class days twice a week(this was a christian school for homeschoolers, if that makes sense lol) so they def didn't have a sex ED. i feel kinda lost now. i really don't know anything about my own body except for the stuff i read online, and i really know nothing about sex except for what i've seen watching porn(which obviously isn't very realistic most of the time).

if you have any tips or info you think i should know then i would really appreciate it if you commented below!! i want to know all i can for when i start dating so i'm not completely lost

(i am 17 btw)