The meetup group mentioned below was great when I went a few years ago. Folks at lots of different levels. Friendly group.

The Olneyville Neighborhood Association has done an intercambio in the past for folks looking to learn either Spanish or English (and K'iche, too!). It was on Zoom due to Covid when I did it, which made it somewhat awkward, but it's the best formal way I've found to practice with native Spanish speakers. It might be a bit hard to hang if you're not conversational yet, though.