There are a bunch of LT games really, all you have to do to find them is search “lt_engine” and if the devs have properly tagged their games you’ll find all the lovely work.
You can also join the LT Discord and there’s a channel within that has most of the games released. Fittingly it’s called game-releases.
On another note, why would your first go to be MF, Wii lol?
If you’re looking for a complete project that’s something a little more “FE” I’d suggest Fate of the Fallen, Blade & Claw, or Daughter’s of Braghedunn.
As for the question at hand, you don’t have to install any other systems to use the exe version of LT Maker, that’s a simple download and click to use.
The only version you need to install git and python for is the git version. And the only difference being these two versions is that the git one is updated in real time.
And when you want to share your LT project with friends, all you need to do is click a button in the editor to build your project and you’ll have a folder you can zip up and send out to whoever.
And you mentioned being able to swap colors easily and not being able to do that in paintnet. You can do this pretty easily, by using the magic wand tool set to 0, pick the color you want to swap out and then swap to the fill tool set to 0, global fill, and with anti aliasing turned off. Then the fill tool will swap out your whole selection with said color. I also recently learned you can click the cog in the upper right hand corner of paint.net to change settings that will persist after the program closes.