I'd recommend you picking up a hobby where you'll have to interact with people. For example joining a beginner dancing class (salsa/mambo). It's a lot easier to

I'd recommend you picking up a hobby where you'll have to interact with people. For example joining a beginner dancing class (salsa/mambo). It's a lot easier to start conversation with people who have common interest. It feels a lot more natural. I'd also suggest to start working out a couple of times a week. It will make you more confident. You also mentioned that you do a lot on your own. Don't expect people to invite you to events. Try to plan something on your own and invite them. Like movie/gaming night, barbecue and etc. That will show that you are interested and want to be friends with them.