Finding classical guitar instructors / groups

Hi, I recently moved to Sao Paulo, and I don't speak much Portuguese.  I thought in a city of ~20M there would be no problem finding people that have the same interest.  I am sure they are here but I do not know how to find them.  Of course, my inability to understand Portuguese is probably a lot of this.  In the US, it would be much easier to find people with the same interest.  In Albuquerque, we had a small group of classical guitarists (mostly intermediate level) and we'd get together a couple of times a month to discuss technique, perform.  There were apps like Nextdoor.  There were other groups that arranged workshops and charity performances.  Could any one suggest how I might find similar here in this mega-opolis?  I am studying Portuguese, so I don't mind having to be a little outside my comfort zone (which is pretty much every day right now when I go to the store, etc).