"but in the meantime i`d like to hone my skills"
Two books I read and keep going back to are Twist of the Wrist by Keith Code and Total Control by Lee Parks. Nothing wrong with just riding around but I would work on something specific each time you go out for a ride. ie. listening to your engine and figuring what gear your at, emergency braking, etc. There is lots of good stuff in those two books. Just gotta let in all sink in your head and put it to practice. There is a video of Twist of Wrist on youtube. Both books should be available at a your library also. later
I liked Proficient Motorcycling more. Twist II was better than Twist I, I thought.
Humber had 250 Viragos ten years ago, some modified for larger students.