[hardwaresofton]

A lot of people I know spend time in cafes when doing school work (maybe even doing classes) and when working on projects during the weekend. While being in the midst of people might not make you any less lonely/isolated (it's easy to be lonely/isolated even in the midst of a big group of people), but you should be able to get some more of that human interaction, and if you run into a person that looks to be coding too, you can strike up a conversation.

Also, what about meetups in your area? That's a great way to meet people with expertise AND meet friends who code/are doing stuff

There are also always the kind of rougher typical suggestions: joining sports leagues or doing some physical group activity (ex. yoga).

You could also take a side-job at a bar/cafe or something.