Godot 4 (Demo Showcase): Making FPS/MULTIPLAYER Battle GAME

I¤tly developing this mini game in 2 versions of Godot. Not very familiar with Godot 4 or what &I may run into so im still developing alot of my assets in Godot 3.x This demo is up and running and something I made in my spare time bc I miss playing games from the 90s like Snakes Revenge ?