I spent a solid chunk of my 20s being an alcoholic in a desperate attempt to hide from myself. Late 20s (like 28-29) I finally moved to the right place, put in an exhausting amount of work into finding local connections, I'm doing a lot better now. Eat healthy, do some kind of physical activity if you can, see if there are any groups near you that share in any of your interests, don't expect it to be solved right away it takes time. Enjoy being at the early side of old people "I just truly don't give a fuck" mentality because that can carry you past a lot of social anxiety. 16 yr old at the MTG table says you have a garbage deck? IDGAF, give them a "I'm old enough to fuck your mom" glare through your beginners crows feet. Bond with the people who think that kid is a dipshit. Being in my 30s now is way better than my 20s I'm happier and healthier (save for COVID giving me fucking asthma never used to need an inhaler)