Hi!
1. You can apply for 2 languages from the get go per account. If you’d like a third on your account (which is the max allowed) then you would have to apply for a “Third language authorization” and then use the acceptance of that to apply for a third language.
2. you can look out for tryouts in the Karakura academics discord and try out for sports in game! There are usually instructions/requirements in the announcements to help you prepare