No offense but why not focus on the mod instead of coloring random images/manga?
We all have our work rhythm.
Actually since I started the mod I have painted images that are not from this game, since I feel that they give me a different perspective, they help me expand and try new things, although I cannot compare myself with experienced artists like Inusuku or Yakumo milk ( creator of Spending a month with my sister), I feel very satisfied with what I have learned/achieved.
Look, their art is really beautiful:
On the other hand, as Blue says, doing this helps you clear your mind and free yourself from monotony, which is also very good since at least it happens to me that if I focused only on 1 thing I ended up losing motivation little by little to the point of getting bored me.
What I didn't do before was show those offtopic images, that's why I wanted to be a little careful the first time, but I see that they liked it which made me genuinely happy
So I would like to continue doing it, from time to time.