You might try meetups around a hobby that you’re into (or interested in learning about). I always suggest boardgaming because it’s a relatively casual atmosphere for meeting people around an activity. There’s no pressure to carry on a conversation and you’re not dating these people, just meeting strangers for gaming. You usually still have to talk about the game and rules as you’re playing, so it gives you something in common to talk about. The rules provide structure if you’re socially awkward, so it’s maybe not as chaotic as just going to a party with a bunch of people there and trying to carry on random conversations. Meetup.com is what I’ve tried before and that worked well for me in my area (results may vary).

That’s just something to get you out of the house, pushing yourself outside of your comfort zone seems like the first thing you’d want to try doing. Getting out and meeting new people can help sometimes. It sounds like you’re in a rut, just sort of bored with everything, or at least wanting something more. Otherwise, maybe pick some sort of hobby or interest maybe you’ve though about before and just throw yourself into it if you have the time and/or money. Learn something new. Start an exercise routine or just start going on extended (30min) walks around your neighborhood. Start volunteering somewhere. Write in a journal. Just do something that’s not part of your typical routine that sparks some new mental connections for you.

And even though you don’t feel depressed, what you’re describing still could be a sign of depression, so reaching out for support is always an option that you shouldn’t feel ashamed of or anything.

Just throwing some stuff out there as ideas, but I hope everything works out well for you.