A few things I'm noticing: you added the Behringer 112 oscillator pair, but there's nothing to process the raw oscillator output (filter, wavefolder, etc). Running raw vco into vca can sound great, but you'll eventually want some more shaping ability. That's the beauty of a module like Plaits/Brains in a small system like this is that it has a lot of sound shaping ability built in, plus the level in and built in decay envelope so it can operate almost completely on its own. This has been suggested already, but I think you should also start with a slightly larger case. I believe it still holds that the best value for money per hp and for quality of power supply is the TipTop Mantis. 6u, 104hp, plenty of power, and given the size of modules you're entertaining you'll eventually fill it. I also agree with Ferran_RMBL in their suggestion for starter modules: CHAOS, ABACUS, BRAINS, SKIES, and a cascading vca like the intellijel one or a Mutable Veils clone. Those modules are deep and you'll get a ton of variety out of them, particularly if your aim is more in the ambient droney side of things. Once you get a grasp of those modules, you'll have a better sense of what you want and what will help you get the sound you're going for. All that said, get a TipTop Mantis case and that subset of the modules, don't worry about completing the rack right off the bat. Get to know the workflow and see what directions you want to explore next. Peace friend!