It's a good starting point but I can't change the size of the navigation bar.
E: And for some reason I can't get into twrp via buttons. I need the twrp app to boot into recovery.
Try SystemUI tuner app, it might change navigation bar size
That is common now in other roms since Pie, you can also go into magisk, go to modules and then click the three dot menu at the top right and select boot into recovery if you don't want the twrp app