If you wanna start dabbling:

Choose a Software

I recommend using Aseprite if you have the coin to spare or somethign free like GIMP or PixilArt otherwise.

Software

Look for tutorials you vibe with

For starters I suggest these, dependign on whether you prefer text content on video content:

[Text tutorial] Derek Yu - PIXEL ART TUTORIAL: BASICS

https://www.derekyu.com/makegames/pixelart.html

[Video] Saultoons - The Ultimate Pixel Art Tutorial

https://www.youtube.com/watch?v=lfR7Qj04-UA

Otherwise, check Tutorials

Choose a community or website to share your art in

You can use social media like Twitter, Instagram or Tiktok, or go to a pixelart-specific website or discord community.

If you find other artists, you can build a decent base of mutuals to share your art with, do collabs and daily prompts, and learn from each other.

Check out Websites & Communities