Soccer Game Two Players

Does anyone know how to create a Sports Head soccer style two player game in gdevelop 5?

https://forum.gdevelop.io/t/flying-soccer-a-game-for-two-player-or-one/24507

But questions like how creating Game XY are far too unspecific and impossible to answer.
What is your experience with GD, what have you already tried,…
I think if you do tutorials, look at examples and work with GD for a few days, you know player behavior, variables, timers, etc. and then you have the basic knowledge to start any kind of game.