This is the plan

 I concocted a plan to plug the holes in my bucket with the aid of some Chessable courses, GM Stockfish and Chess Tempo.

Main focus

• Chess principles reloaded - center
• Chess principles reloaded - development
• Chess structures A grandmasters guide

Specific techniques

• The Art of Awakening pieces
• The Art of burying pieces
• The art of exchanging pieces

Endgame strategy

• Arkell's endings
• The Strategy Instructors Volume 1: Pawn majority & Minority

The main leading course will probably be the one about Chess structures. I intend to take a certain pawn structure (there are 28 common pawn structures in the book), like for instance the Isolani, and then fiddle around with the pieces and Stockfish in order to find out some rules about piece placement.

There might well be a consequence for my opening choice. If that is the case, I want to know it as soon as possible.

Somewhere this summer I have subscribed for a nine day tournament. I intend to use that to experiment and get some useful feedback.

Sounds like a plan to me.