>>1 Girl, just know that he can blackmail you for that if you live in an area where prostitution is illegal. "I won't give it to you, and if you try to take me to court, we'll both get arrested for prostitution," etc. etc. not to mention threaten to tell friends / family if that's something you're concerned about.
You know it's morally bankrupt to do it. You know none of us think you should do it.
But if you do it anyway, make sure you get that car before you put out, and make sure you have a friend in the area or an uber ready to pick you up in a reasonable time frame so you can gtfo. Bring a charged phone. Bring condoms of different sizes just in case. Look up what different STD/STIs look like compared to regular dicks so you can recognize them.
And assume he's going to be a complete prick about it because he probably thinks you're lying about it being your virginity already. (If you're chick, know that not all girls bleed, so you can't rely on that either.) Just hold your own and get it in writing.