Thank you for your advice, I'll try to go into the next works with more confidence!
I find that although I enjoy composing with notes in MuseScore (I'm a bit oldschool... ), the dynamics are definitely a bit easier to play around with in a real DAW. I think I was kind of afraid of doing something with these that would dis-qualify them from the jam for grounds of unoriginality (even if... everyone uses the stems from their DAW, right?) and tried to keep re-doing some of the sound in MS directly instead. Definitely will keep experimenting and learning :) Thanks again!