As ‘new and very enthousiastic user’ I want to try use the zynthian headless with a remote UI on a second screen. I have tried aswell the implemented NoVNC modus via Webconf and also the method with an external VNC viewer. Tried to use all ports mentioned in various manuals and Wiki-pages but always end up in the screen with terminal-emulator, the native GUI of , in my case the active ZynAddSubFX synth, patchage etc. but never into the Zyntian UI with the 4 knobs in the corners.
I use a Rasp4 with 7inch touchscreen connected and that works fantastic.
Ah! What version of Zynthian firmware are you using? There have been some changes to VNC since the last stable version - 2104. You could switch to the testing branch (webconf - SOFTWARE->Repositories) or wait until 2109 is released within the next couple of weeks.