I know the OP already purchased their Dyna and as most experienced riders have witnessed, several new riders can and do end up on something that can be totally unsuitable to start out with.
I come from the school of thought, if you learn on a smaller lighter machine, it's a lot more forgiving. I'd rather see a rider develop skills that can exceed the capability of the bike they ride instead of "growing" into the bike they desire.
I've known a lot of riders can and have purchased big touring machines and went on to ride safely and without incident for years.
If you keep to the two lane black tops (which IMO is much more enjoyable than an interstate), a smaller bike can be a whole lot of fun. And if you forget to put down the side stand at the local hang out because your grinning so much, the only thing you bruise is your ego and not your pocket book as much.
The Dyna is a great machine. But, it's a heavy machine that is easy to drop in a slow speed parking lot and if it falls on your foot or leg, can put you out of commission for awhile and put a damper on your future riding impressions.
So to any new riders looking to start out on their ideal bike right out of the gate, just keep in mind a lot of seasoned riders had humble beginnings on older machines that had between 350 ccs to 650 ccs.
This isn't to say all new riders should or must start out on something smaller or less desirable just to gain some experience. But, I can tell those new riders that do start out on older, lighter, smaller machine, they will generally be respected by experienced riders.
I've never looked down on a new rider that started out this way. But I have shaken my head at new riders that pull up with a high performance rocket or bigger cruiser and see them struggle with it.
Just food for thought..........