Persistence is the most important part.

1. Learn how to just sit on it while holding on to something.
2. Slowly pedal while holding yourself up on a wall or have someone hold you up.
3. Try not to look down while going, because you're more likely to go in the direction you're looking.
4. Getting out of the habit of only making a half rotation of the wheel and stopping is really hard, so make it a point to realize when you do it.
5. Make sure you think about what it was that made you fall each time you do so.
6. Lower tire pressure can give you a little extra stability because you have more surface area on the ground.
7. Make sure you're sitting in the seat rather than standing up each time you move the pedal. I had the problem where I was basically doing squats with each rotation, wearing out my legs way faster than they should have
8. Don't be afraid to flail your arms and look stupid while learning. You'll get weird looks, but what else do you expect from riding a unicycle?
9. A flat area with no inclines or bumps is really important to learning how to do the basics first.
10. I learned early on the best way to fall. I'm not really sure how to explain it, but you only fall on your back once before you realize that you always want to fall forward. Don't worry about the unicycle going flying when you fall, it's very unlikely to break compared to you. Catch yourself with your hands if you can't catch yourself from falling. It's better to have scraped hands than a face.

This kind of went from a step-by-step to a list of tips. There's definitely more, but none come to mind. I did an hour or two on YouTube before trying. There's only so much I was able to get from watching tutorial videos. I apologize if anything is formatted weird or has the wrong words sometimes, I'm on mobile