Programming the Baofeng (Chines) radios can be a real challenge. Here are some recommended web sites and devices that we hope will help you.
Baofeng Cheat Sheet
What I like about this cheat sheet is all the information is on one page. https://w7apk.com/baofeng
Baofeng Programming Cable
There is a programming cable available if you have a computer to program some models of the Baofeng radios.
The cable is called: BTECH PC03 FTDI Genuine USB Programming Cable for BTECH, BaoFeng, Kenwood, and AnyTone Radio.