I have a Samsung Galaxy J3 (2018) smartphone which currently has the stock Samsung Android OS installed on it. I wanted to install an Android “distro” that doesn’t spy on me, like Graphene OS, but I couldn’t find a ROM for it. Since I would probably need to compile AOSP from source code anyways, I though, why not install Gentoo on my smartphone (doing the compilation on a more powerful computer using distcc). I have already installed Gentoo on both my laptop and desktop from a stage3 tarball and I’m loving it, so I guess doing the same on my smartphone wouldn’t be too hard.
Now, the problem is that I need to use a few apps that are not available on Linux, like the proprietary app that I use to pay for my bus tickets. How well does waydroid work?
Have you installed a custom ROM on it? If not, you definitely don’t have the skills for this. If so, have you built your own ROM for it? If not, do that so you learn how it works in a predictable environment. Then port something existing to it, like UBPorts. Only after you do all of that and probably a lot more should you attempt to effectively develop your own distro on hostile hardware.