Like the OP, I'm not a lifelong rider. I learned how to ride in my 30's, without ever having been on a bike before. No friends to show me the ropes. I went and took the MSF course at a local college like the OP is doing, and then off I went.
Some folks will agree with my opinion, some will vehemently disagree, but it's my post so my thoughts...
I think a Big Twin is too much bike for an inexperienced rank newbie. Same goes for sportbikes. I say this as someone who WAS that newbie a few years ago.
I suggest you pick up an inexpensive Standard or under-900cc cruiser on Ebay or Craigslist. Ride it, get experience on it, drop it if need be [it's a lot better dropping a older Shadow or Sporty while you're learning than dropping a shiny new Gunner]. When you feel as though you're confident enough as a rider, then you get to reward yourself with a "new" bike. Go sell your beater inexpensively on Craigslist and then go shopping.
I am preaching what I practiced, because this is exactly what I did.
This may be the time for some Tuff Guy © reading this to reply, "Raa! I'm a Tuff Guy © who learned how to ride on a 2400cc Rocket III when I was an infant! Don't be a pu$$y!" or something of that nature.
To which I reply to you in advance, DON'T feel pressured into getting yourself into something too big/too fast when you have already admitted that you are just starting out. Get what you honestly
with. Craigslist and Ebay will be there for you to sell it off cheap next spring and then reward your experience with your 'real' bike.