I probably wouldn't recommend the Harley Davidson 750 Street for a newbie. A quick google lookup says the motor is about 57 HP. That might be a wee bit strong
It's a heavy bike though. Power to weight ratio is probably similar to other starter bikes.
Also look at the HD Sportster 883. That's been the beginner Harley for a long time. The air-cooled engine is a bit less powerful than the water-cooled 750, and it's heavier as well, so much lower power to weight ratio than the 750 Street.