Good morning it flies, I am pleased you want to become a more proficient pilot and would be even more pleased to help you succeed.
I see you live in Holland and that makes it quite simple to point you in the right direction.
Here is a link to Wings over Holland.
You go to Lelystad and ask for Bert.
You tell Bert I sent you and you want to learn how to become a proficient pilot.
PBY Flight Training - Chuck Ellsworth / Wings Over Holland
After you talk to Bert you will never again wonder about accepting the advice I am giving you.