Welcome!
Wonderful to hear that you’re going to use Sonic Pi to spread the joy of creative coding in Angola. We would all love to hear of your journey doing this.
In terms of getting started, I would work through the tutorial yourself first to get a feel for what Sonic Pi is and can do - https://sonic-pi.net/tutorial.html
Then I would look at some of the many existing resources that are available - Sonic Pi Online Resources
My personal favourite is the Mehackit learning materials - http://sonic-pi.mehackit.org
Of course, do let us know if you have any questions or thoughts. We’d all love to help in any way we can.
Good luck!