Welcome aboard mate, youre off to a great start, definitely not a beginner. You saved up for education on your skills I respect that π
As for gesture practice, while there are great artists that scribbled their entire life (look at david finch videos on youtube), using big ass canvas size and your shoulder to make sweeping flowing lines that cover most of the pose action with least strokes possible is actually a great exercise, so donβt discard @uraniumpuppy βs advice, its definitely worth it. Instead of doing them fast, when making the switch take your time and analyze each line at first. Try summarizing everything in either C S or I lines
Cheers!