There's something to be said for joining a club or joining a church if so inclined.
It's much easier to create a community once you get rolling, but very hard to get started.
Getting a job in an office is good, it'll help build friendships. I'd just caution against that being the only community you're apart of. I personally try to be apart of 3-4 communities, it keeps me busy and makes my life more robust if one community is impacted.
"Rock climbing", "going to a coffee shop", isn't a community - those are effectively solo activities. You may get some human contact, but it's not someone you can call when you're sick.