OP I want to give you my perspective (from a younger guy). I've wanted a bike for the longest time but for me it wasn't a viable option when I turned 16, financially speaking. Later on I went to university and my parents+government paid for all of it, leaving anything that I earned for myself, I though I had the money to buy a ****** bike but I decided to spend it on stuff to enhance my social life and experience as a college student instead, trust me, you don't want to miss out on those amazing years because you're broke.
My next and very important point (that many people have touch on already) is your experience on the street. I did get my G1, G2, and G as fast as possible because many insurance companies go down after having your G for over 5 years. I also drove my parents car around and I LEARNED to drive in the streets before anything else. Though you might think you're skillful enough to ride a bike, the streets are a dangerous place because you need to not only learn the rules of the street, but you need to understand the behavior of other drivers to be able to prevent accidents, though driving around doesn't mean you'll be good at driving (I know people that have been driving for over 20 years and they're a danger on the road), but it does provide more safety while you're being introduced into this new environment.
Third is your maturity. I can't really judge this matter since I don't know you, but you need to be VERY aware that motorcycles are fun as hell and they can go very fast.... though I follow the majority of the rules in the street no one in this forum can deny that they don't enjoy speeding up down a straight (specially if you ride a ss). Fighting temptation is very hard, and a small mistake can cost you more than you think so. So younger age = less maturity generally. Again, I'm not saying that this is the case for you, but you need to be very self conscious about this fact because you might end up affecting other people's life as well if something were to happen to you.
I don't regret not getting a bike before I finished university but hell I LOVE MY BIKE with crazy passion now. My suggestion is, if you're financially in a position to step into the hobby, don't rush for the big bikes, learn with something smaller <=250cc that will allow you at the same time acquire motorcycle skills and give you an understanding on how the street works and what you have to look out for (reckless drivers, drunk drivers, trucks, road hazards, etc), and enjoy your life most of all, don't scarify everything you have for one thing.
I know that you will ride eventually, and until then, like we all say... Ride safe!
P.S insurance wise you will want to kill yourself with the first few quotes you get, but I ended up doing what you suggested before, I'm under my dad's insurance (bike is under his name) and I'm a secondary rider. You will have to find a broker that's willing to do it because many of them seemed to get offended every time I brought this option up. Good luck!
