Congrats!
Good plan on getting the learner bike to get started. I'm a big believer that one needs to start out on learner bikes, and then move up once they get some more experience.
I agree, but learner bikes have knobby tires and run on dirt....My learner bike was a Yamaha Mini Enduro, I rode the balls off of that poor thing. Then when I was 11 I got a step up bike... A Maico 500 LOL. Good thing I could ride by then because I couldn't stop without getting off. Outside of brief forays on back streets of suburbia cutting through neighborhoods to get to work, friends, and the woods nearby, I didn't ride on the street until I was 21 and bought a Yamaha XS Eleven Midnight Special in San Diego for $500 from an impound yard. There is a major transition to riding on the street, people are actively and inattentively trying to kill and maim you. There were quite a few occasions where the only thing that saved me was the ability to twist the throttle and instantly accelerate from 45 or 55 in high gear to 80+. The brute torque of the 1100cc engine allowed me to accelerate hard as without down shifting and there were times when the car was within inches of hitting me and had speed on me. 750 is the minimum I consider safe on the street, if you can't handle a 750, you shouldn't be on the street yet. I currently own a 600 sport bike that's a bit souped up, and I consider it to be underpowered for the street. I've said it before and I'll say it again. The street is no place to learn to ride. You should be an expert rider and understand that the throttle is your best friend and how to use it with no fear of what it will do to you before you get on urban roadways or major thuroughfares.
Dirt also teaches you how to deal with suboptimal traction conditions. An example, Av Shilo and I were on Grand Cayman on scooters, he was behind me. We came through a roundabout where someone had spilled oil. I started to slide, turned on the throttle and rode out of it sideways. In my rear view mirror I watched Av lay it down. He ended up with some pretty good road rash. The turning on the throttle was instinctive to me from a lot of time riding sideways in the dirt. I was spooling up my gyro. Av didn't have that experience base. His experience base was from a car where if you start to slide, you get out of the throttle to regain traction. Problem is, bikes and cars are different animals. A car is intrinsically stable, a bike is intrinsically unstable. It gains it's stability dynamically from the wheels spinning.
This does all come from a guy whose riding apparel is typically shorts, t-shirt, flip flops and sunglasses, so take it for what you think it's worth, but in a lot of years of riding (10 years in SoCal all I had was bikes) I've never had a crash on the street. A hell of a lot of that is attributable to my time in the dirt, where I had a hell of lot of crashes, and some time on road tracks and a season of campaigning a flat tracker for an injured friend so he wouldn't lose hes sponsor. These are environments where you can really pour it on and ride balls to the wall and concentrate on the riding and the motorcycle and learn how they act and react. On the street, you don't have that luxury. You need to put every bit of your attention into what is going on around you. You have to be looking at the cars at the curb on the horizon, because they're the ones that are going to pull out on you or open their doors. You have to pay attention to who's coming down the on ramp, because they're the ones that are going to have speed on you and be heading for the left lane. You have to be looking at the surface conditions of where you are going. Here's a major tip, NEVER look at what you're avoiding, always look at where you need to be to avoid it. That means you really need to know to the Nth degree exactly where a bike will fit. Blasting through woodland trails teaches you that in an environment where you can really slow it down without getting hit from behind.
Learning to ride on the street is suboptimal and is the direct cause of many accidents. Remember, every accident you have on a bike is your fault because you should have seen it coming and avoided it. You can't dedicate that much attention to the street if you're paying attention to the bike.