Have a look on xdaforums for your device, there will be guides. With the Samsung for example you have to enable bootloader flashing in existing rom developer options otherwise it will overwrite on a fresh boot. Gxda is a trove of info though

Have you tried Newpipe? Lovely YT client for android :)

Ad free is the only way for a service im paying anything for. If they introduce ads then i will no longer be paying.

Fucking astounding isnt it. Where’s cancel culture when you need to rid the world of a nonce? :P

About 3 weeks after your 14th birthday