I had a lot of fun with the lasso practice. I turned it into an exploration of Kyle Webster brushes.
Here is my floral illustration, created using the lasso tool. Among the Kyle Webster brushes used were (from Kyle's Real Watercolor) 500 Giant, Color Magic 2K17 Variant, Alcohol, Add Paper Texture, and (from Kyle's Scatter Brushes) Asteroid Belt, Beautiful Mess, Dots 1, Dusty Bits, and most importantly Etching Dirty. I found it easiest to make "collage papers" using these brushes and duplicating the collage papers, transforming, and clipping them to each layer created from the lasso-ing.