Well, if you prefer a Open Source Launcher I would recommend F-Launcher.

If you need to connect you PC and Shield without VPN/etc you can use Tailscale.

If you need to Sideload Apps you can use Downlaoder.

If you want to watch YouTube without Ads you can use SmartTube

If you want to remap your Remote you can use Button Mapper (It maybe ask you to pay "premium" but you can ignore it and everything will work fine)

If you want to change your default Launcher to something else (not Nvidia Launcher) you can use Launch Manager and a short tutorial