I concur with the previous recommendations.
What strikes me is the feeling that you are not yet confident with the basics of synthesis, nor the implementation in synthesizers.
I have no clue about aquariums. Similar to synthesizers, it doesn't make sense do buy a tank, some stones and algas, fill it with water and drop some fishs into it. For sure they will not survive. Beforehand I should have done my homework! Same here: Teach yourself a foundation knowledge how all of this works together and have a testbed for hands on experience.
a) worth reading to build up knowledge:
SYNTH SECRETS. Gordon Reid's classic 'synthesis explained' in-depth series in Sound On Sound. The article series run every month, non-stop, over 5 years and is still used by Colleges and University courses as 'essential reading' when teaching the foundations of synthesis and sound design.
https://www.soundonsound.com/series/synth-secrets-sound-sound
PATCH & TWEAK is a comprehensive look at modular synthesizers. It explores how to build them, how to use them, and how to get the most out of them, with beautiful illustrations and step-by-step tutorials with easy-to-read patch diagrams.
https://bjooks.com/products/patch-tweak-exploring-modular-synthesis
b) add hands on experience:
With all the recommended theory readings, I would have also added a semi-modular synth for the beginning. Most of them are ok to start with. Just add a cheap MIDI keyboard if you use one without keys.
You have a Behringer Neutron, which is exactly a semi-modular synth. You are ready to try what you're learning.
But, read the USER MANUAL and understand all sections first, before you judge on your gear.
After you are through all these recommendations, we would be happy to read your experience and feedback here in the forum.
Happy experimenting!