Don't panic. Start slow. Learn one module at the time. Be sure to read the manuals. Start with simple patches and when you explore few modules then just add another. By time you will see which modules you don't like and you can sell them.
PS: You have not enough VCA's!
-- reflecture
I fully agree with reflecture here, excellent advice. Simple patches are the way to go when you are lost, simplify your signal path and take things slow, you don't need to be creating masterpieces on your first minutes with your rack. Just exploring a few modules at a time and see how they respond to being fed different types of signal can be very rewarding (and give you ideas you can use musically). This will also teach you what you like to do with a modular setup and how you like to patch, which varies a lot from one person to the next and while trying other people's ideas can be fun, trying your own is equally if not more important.
Take Plaits for example : when I first got it in my rack, I needed a week of simple patches with it just to have an idea of which algos I could prefer in which context. The module is so deep, I even feel I have rushed things by spending only a week with it in "isolation".
And in the end, it can be a question of how you patch and your personal taste/needs, but I would also consider more ways to control modulation, like VCA's and attenuators.
Have fun with your setup, it's a good one !
--- Voltage control all the things ---