I think you could use this to make music, but you'd probably spend an extra 2000 on selling and switching out modules until you arrived at something you actually find usable.
You'll end up doing a lot of that anyway, but buying everything upfront is a surefire way to maximise waste.
If you're dead set on modular I'd take the VCV advice. If you haven't made electronic music before, trying using Reason or something else to find your feet and discover the joy of patching. Eurorack strikes me as a pretty treacherous place to start, unless you've got a focused vision and load of money lying around.
Also you don't need a dedicated module to do ducking, you can do this with vcas or Optomix. Part of the enjoyment for me is finding ways to make the most of simple components.