This community has two wiki pages too - you can add to it.
Getting started with VCV Rack
Getting started with VCV Rack - Video tutorials
relevant to synthbuilding and electronics in general:
- Synth DIY Wiki
- The Synth-diy Archives
- diyAudio
- electro-music.com :: View Forum - Developers' Corner
- Music Tech DIY - MOD WIGGLER
And some discords:
- Colin Benders | Modular Mayhem (there is a #vcv-rack)
- VCV Discord Server