Thanks a lot guys! Its been really fun to do some of those exercises.
The past week I tried to get used to split 50/50 of the time I spend drawing between studies and "drawing just for the sake of drawing" (or putting everything that i studied in practice on a full piece) to avoid burnout. So far its working nicely.
For the study part, I practiced some loose sketch portraits. I had 2 things in mind while doing those: 1- draw the face with correct proportions and planes and stablish the light and shadow areas with simple values quickly (About 30-40 minutes each); and 2) work on brushstrokes to play with edges and shapes to make it more interesting (Im trying to follow what Marco Bucci teaches about this subject on his Value/Edges video).
And for the other half of my time, I have a "splash art like" piece that I didnt finished yet and I did a portrait of Raiden Shogun (Genshin Impact). Tried to use some texture and lost/hard edges to bring the focus to more relevant areas of her face. The process was greyscale then added the colors by using different layer blend modes.