Hi Troux, All,
How about "Get started with at least a monster case of say 3 * 168 HP" ? ;-)
Most of it has been said already indeed. Perhaps pointing out to the very basics of (modular) synthesizer as well? Like you need at least: 2 oscillators, 1 or 2 filters, VCAs you mentioned already, 2 LFOs, 2 EGs, etcetera. Before even thinking about "sexy looking modules".
If you need that picture that I made of all those functionality stuff, you are welcome to use that link to that picture, no problem.
Good luck with it and I think it's indeed to have one of such posts stickied here in the Racks section. Kind regards, Garfield.
For review reports of Eurorack modules, please refer to https://garfieldmodular.net/ for PDF formatted downloads