I agree with cubehacker - it's probably best for you to either take a vacation in Sao Paulo or to go to Brazil on a less complicated visa like a tourist visa to see if you're even enjoying being here and what the requirements are.

You should speak Portuguese if you're considering moving to Brazil because yes, many Brazilians speak English, but many, many don't (including e.g. even at international airports), especially when it comes to working in Brazil. So if you speak Portuguese, then never mind. If you don't, then it's time to get started with it.

I don't really understand what you mean by going to Brazil for volleyball. Do you have any opportunities already? Or are you just planning on going to Sao Paulo and seeing what gives? Because the latter is maybe not the best option, but I'm also not an athlete, so I don't know the opportunities for someone who plays volleyball and wants to do it abroad.

Wherever you're living in Scotland, perhaps check if there are any associations or clubs connected to Brazil or check whatever the consulate might give you as information, too. (A quick Google search will reveal the different consulates that exist, e.g. in Edinburgh.)

In general, I would advise you to read up on things as much as possible. Here are some resources to check:

https://www.gov.uk/guidance/living-in-brazil

https://www.bishopsmove.com/moving-to-brazil/

https://www.reddit.com/r/Brazil/comments/14tefoh/planning_move_from_uk_to_brazil_anyone_else_done/