@_-Peyton-_ most people call this type of bracelet 'alpha bracelet'. You can find many videos on YouTube explaining to you how to tie alpha bracelets.
If you want to design your own pattern, you need to go to the 'create patterns' section on the braceletbook website. It unfortunately isn't on the app.
@_-Peyton-_ It's not easy to make a pattern. Some people has been on here for 4 or 5 years even longer and they know how. I always get frustrated trying to figure out how to make one. I think you should try this one, it's called the double knot friendship bracelet.
That is the only one I actually know without getting frustrated.