Soma cube puzzle

This is my first design in Fusion 360, I do not have any prior 3D software design knowledge. Any feedback, help and suggestions (for improvements for ex) are welcome. I have not yet printed this out yet myself.

I love solving puzzles (espiaccly cubes) and would love to make some puzzles myself in the future.

// Printer: Ender 3 v2 //
Suggested settings:
Walls/shells: 3
Resolution: 0.2mm
Top/bottom layers: 3

// Cura Print estimations //
Time: 4h 33min
Filament: 40grams, 13.40 meters