That's not something you can do as a beginner in Linux. I'm porting Linux to a phone and even after using Linux for 18 years it's not an easy task.
If you want to use Linux on a phone, get one that is supported. (Or get comfortable with the shell anf inner workings of Linux and put in a lot of effort.)
For example, I've ported Mobian to the Pixel 3a and that works quite well and is cheap. Pretty sure others will have more recommendations.