I really love your art! Do u mind telling me what device do you use to draw?
I use an iPad + Procreate! (iPad Pro 2020 i think but that's not really important for my workflow because I never reach the layer limit). I mostly use default brushes (2B pencil, quoll and flat brush) I edited a bit for my preferences. Here you can find them in case you also use Procreate:
Another important thing is I always use the Coated Fogra39L VIGV 300 color profile, and then sometimes I just copy and paste the final artwork in a different RGB file before posting.
Original CMYK color profile:
After copying and pasting in a RGB file:
Also, I like to pick my colors by setting the CMYK component values manually. Weird I know, but it's really good to make sure colors look good printed! To make important base colors stand out more, I just aim to keep their K/black value as low as possible.
Sorry for the infodump, I just wanted to share my brushes even if they aren't anything special hehe. Hope this helped someone!