Thank you :D
I don’t really have any plans on making a tutorial, but I can recommend this tutorial, I make mine a little differently, but it’s still a really great tutorial and easy to understand.
About the colour, I tend to only use curves, selective colour and occasionally colour balance when making colourings for gifs, I guess just try not to go overboard when adjusting them, and it should turn out fine. Or you can use psds, search psd on tumblr and there are heaps to choose from, you can play around with them it’s probably easier than creating one from scratch. If they’re still pixelated, it could be something to do with the options you choose when saving it, or the quality of the source you take the caps from. I’m far from an expert, but I hope this was somewhat helpful. lol