Cool and big thank you @ Tiago1973 and @Capi!
Some of the places you name, Tiago1973, I recognise from my web searches, such as Guincho. This spot seems well-known and appreciated but I also read, just like you say here, it is recommended for experienced kite surfers as the wind and the waves are quite strong.
So good to hear and have it confirmed from someone experienced and who has been there!
And especially to get some other places/options!
PS: Of course, I´m eternally thankful for advice/tips as this might be a "make it or break it" trip:
either he "kills me" because there is not enough wind
... or he gets killed because there is too much wind!
(and I obviously don´t want either of this!)
Thx again and happy WE to you both