Start with one of the basic oscillator "voice" sections (the Noise Reap one, actually...get used to all of the crossmod and sync possibilities there), plus the stereo submixer and probably the Linnaeus, as it'll have the steeper learning curve.
-- Lugia
Lugia,
I've taken your advice and gone with the Paradox, Linnaeus, and the Sub-Mixer as my first modules (along with an ES-9). The Linnaeus is certainly capable of so many things – just messing around with it is producing crazy stuff.
Would you happen to have any advice on particular techniques for coaxing out some beautiful sounds from this beast? Here's some sounds I got from Paradox + Linneaus (seq, env, reverb via VCVrack)
https://drive.google.com/file/d/1SLEcaCXXZsyFxDvDZ0YSTtEs9z3RD-FK/view?usp=sharing