Sure! I use Pixelorama for my art, it's free on itch.io: https://orama-interactive.itch.io/pixelorama
If you'd like something simpler I also used Piskel before this!
Now as for how I made the art, I don't really consider myself to be *good* at art yet, For drawing a lot of things I searched google images for references with things I had trouble drawing (either other pixel art or real life photos), of course you shouldn't copy references as is, I just look at how they do certain details and draw ideas from that to improve the sprite. Now I suggest you follow actual Youtube tutorials or something because most of the time I don't really know what I'm doing when drawing 😭