The windiest destination isn't automatically the best destination for learning. In fact, it can be the opposite.
Very strong wind, waves and difficult launches add unnecessary complexity when someone is still working on kite control, water starts and riding upwind.
For beginners, the quality of the training environment matters more than finding the strongest wind statistics.
Brazil can work particularly well because riders can base themselves in Preá and build consecutive training days around the conditions.
If you're not yet riding independently,
kitesurfing lessons in Preá can be a better starting point than jumping straight into downwinders or travelling between advanced spots.
Cape Town, on the other hand, would not be the first choice for someone whose main goal is learning from zero.