hi all. getting ready to take a bold step and want to (try) to have all my ducks in a row before getting started. this is a 16x20 stretched canvas drawing of my wife (with a few corrections needed). With an image this close up and this large what size brushes would you recommend? i would still like to use filberts. and i would like it to be a little loose and not blended so much. sorry it looks funky, the lines are barely visible in real life so i had to change the exposure, gamma, saturation, etc in photoshop just to see the drawing at all. thanks!