If you follow a tutorial: Switch it up to make it yours. Make small changes. For example: If the tutorial is for a shoot 'em up where the camera scrolls top to bottom, make your game scroll right to left. Stuff like that forces you to think differently about the work, which should help you understand and retain the information better.
There are also interactive tutorials like this one from GDQuest for Godot: https://school.gdquest.com/courses/learn_2d_gamedev_godot_4/learn_gdscript/learn_gdscript_app































Have you tried Lightworks? The free version is less than useless because it limits export to 720p, but it includes all the codecs. Available as a deb, rpm and flatpak. And it’s European - sort of (originally based in the UK, now owned by an American parent company) It’s the other Hollywood tested editing program for Linux