"I want to get paid for videos I upload to YouTube. I think this means I need a YouTube partner account, but I don't understand how I can become a YouTube partner."
YouTube outlines some minimum requirements for becoming a YouTube partner, which I'll paraphrase here:
You need to create original videos of less than 10 minutes in length. You need to either own these videos or have express permission to use the videos and monetize all audio and video content included in those videos. You also need to update your video channel regularly, with videos that get viewed thousands of times each. I'll break down what this means in a bit more detail.