https://vegastack.com/tutorials/how-to-install-lxde-on-ubuntu-22-04/ This is the guide I was using, if it helps. I’d take a look at section 1, step 2, where it shows the picture of the “Configure LightDM” menu. I think it’s probably not too bad, but I’d be curious to hear how it goes.
I use FBReader everyday. When you say that it’s netblocked, what do you mean? I’ve been able to use it in airplane mode with no issues. I’m using v3.7.6.