I recommend you also have a look at the following mods that make using VenusOS even better:
VenusOS GUI enhancements and modifications. Contribute to kwindrem/GuiMods development by creating an account on GitHub.
github.com
He also have a simple setup to make enabling the screen real easy:
Raspberry Pi 7" touchscreen for Venus OS (also HDMI) - GitHub - kwindrem/RpiDisplaySetup: Raspberry Pi 7" touchscreen for Venus OS (also HDMI)
github.com
I made use of some of his mods and tweaked a few things for my own needs.