Hi, I find I have similar trains of thought, but I think you are getting way ahead of yourself. I am a recent college grad, until recently never gone on a date or done beer pong.

After years on and off dating apps I got a date, and during it slipped up that it was my first date (my date was much more socially competent than me, she has been on many before). There was surprise and it was slightly awkward, but nothing catastrophic, she commiserated on how hard it is to use these apps and said it was somewhat of an honor that this was my first date.

Same thing with beer pong and parties, I only started drinking after college and was at a party only knowing 3 people there. People are very eager to teach you drinking games and have you try drinks, even if you met only an hour ago.

Sometimes you'll meet people who are jerks, but I think that becomes more rare after college. And if someone does make fun of you for being inexperienced, they aren't the people you want to party with or date, in fact making fun of you shows they aren't socially well-adjusted themselves. Most people you will socialize with won't be cartoon bullies.

The difficult part is finding the opportunities for dates or parties, it helps if you have friends you are comfortable with. But using dating apps, going to parties, trying to start a study group with a lab partner, joining coworkers after work for drinks, and meeting friends of friends are all good starting points. You won't be 100% on your game socially, but that's how you get XP. Just gotta be brave and do it when the opportunity arises.

DM me if you want to talk more about it, I feel like I'm in the same boat but recently making small improvements