Sorry for that noob question: i do not grasp the idea of vlan fully: will i still be able to connect to devices in the locked down vlan (the tv, the printer) from the devices in the “normal”, open Wifi (like my phone streaming to said tv).

Right now i have a gl-iNet router (brume 2) that uses adguard to block advertising sites (and also home phoning destinations of popular brands), but not sure if that does the trick already.

That’s interesting - I have a C1 (2021). Where or how do you block these updates and have it connected to your local network?