Here's a tutorial I made to convert a Bird Scooter for personal use.

Now it is generally VERY plug and play, but if you want to use some of the more advanced features you'll need to use a bluetooth app.

Also, I mention that I used a "Pro" board as a replacement so I can see my speed. The "Pro" board actually requires a different firmware to fully function. I used a YouTube guide here to resolve that:    • How to install Xiaomi Electric Scoote...  

Good luck!