Just don’t get the Blast. It was a good beginner option before, but you don’t want to rely on H-D’s promises to honor support for old Buell models. I’d dodge that nightmare if I could.
Regarding height, the biggest issue will be the length of your lower-leg. I’m 6’4″ and started on a Ninja 250R. I had to get adjustable footpegs (about $130 total) to lower the pegs for a bit more leg room, but since then I’ve had no comfort issues. If you have an inseam longer than 36, however, you may be in trouble. The trick is to go sit on one, have a friend hold the bike up, and put both feet on the pegs. Get into riding position and try foot braking and changing gears, both up and down. These will present an issue for you without aftermarket pegs, but at least you’ll get a sense of how much room you’d need. Adjustable pegs will give you up to an inch of extra room.