I just remembered something, sometime ago I uploaded a drawing to my Deviant Art and one of my friends there told me it would look nice in pixels and she recommended me a program called Paint.NET, she said this program has a tool that allows to easily draw pixel lines over a drawing. Maybe this program would be useful to make sprites, I couldn't try it back then though, because it requires Windows XP SP3 or higher to work and my computer is an old tin can my brother gave me, I think it's SP2 lol.
Someone else could use it though so it doesn't hurt to mention it.
The closest I made to pixel art so far are some fonts and a couple of attemps to draw lines over drawings, I assume I can make sprites that way?
these are the latest fonts I made, I still have to do the capital letters but I'm so lazy I don't even remember why I was doing these lol
since I already have them I hope to be able to use them in the game