Struggling with dating/hookup culture

Hi I’m a 23yo, geek type, currently struggling with

cold feet when meeting new guys in all aspects tbh.

I used to be very open about my sexuality and hooking up, but after a bad breakup n a few dating fails I’m really struggling with if it’s worth going back out there. I tried seeing if it would work with my ex again but I don’t think he really loved me, just wanted sex and companionship on his demand only.

I wanna hookup or have a new fwb but I’m afraid of having a bad experience again or feeling like i wasted my or their time. Seeing news about higher STD rates and crazy people in the world doesn’t help either.

I’ve just been jacking off a lot now and when I do get the chance of meeting up, I clam up due to what I said prior. Idk if it’s shame, nerves, I just get embarrassed when the post nut clarity hits and I’m rereading the sexts I sent out, seeing all the desperation I guess😭.

Is anyone else has struggling/has struggled with this? What helped you push past it? Ik at least with my generation it seems like hookup and dating culture is disappearing but idk how true that is in our community. Anything would help and I appreciate anyone putting the time in to read and respond☺️.

TLDR: Afraid of putting myself back out there after a bad breakup and dating failures. How can I feel less nervous about dating and having sex again?