oh man, it's easy to do but takes dedication. it takes time to get it going. I can't remember what website I used when I got started since it was a long time ago but this article seems good

https://www.theclevercarrot.com/2019/03/beginner-sourdough-starter-recipe/

Look up Joshua weissman ultimate sourdough he has a good step by step video

I just used the King Arthur baking recipe for maintaining since I got discard from my sister. And I'm proud to say mine survived when she killed hers and I had to give her some discard to restart 😂🎉.

The Sourdough School cookbook by Vanessa Kimbell is a great resource.