I’ve had good results with https://www.joshuaweissman.com/post/sourdough-bread (definitely watch the video).

If you have a stand mixer then follow this: https://www.youtube.com/watch?v=UEAHA6OHxPs

My personal tips:

• Do the resting parts in your oven with the oven light turned on. That should provide a good warm space without having to heat a whole room.
• I find cutting the top with scissors (like in the second video) easier than using a razor
• If your dough doesn’t look like it’s getting big enough, let it rest/proof for longer; you’re probably more likely to accidentally under-proof your dough than over-proof while learning
• You can use any oven-safe pot + pan that fit together if you don’t have a dutch oven type of thing (check their rated temps though)
• You can use a tea towel/dish towel (just something not fluffy/fuzzy) in a bowl if you don’t have bannetons
• Your bread probably looks better photographed than irl (“the camera adds 10 pounds”, but to your bread)