1. This is NOT a beginners bike.
2. This is NOT a heavy bike. Maybe compared to a 250 it is heavy, but it's actually really light.
3. Find yourself something smaller for your first bike and learn to ride on it. This bike will overwhelm you if you aren't careful. Even a 600cc bike will get you to insane speeds in the blink of an eye.
4. Sorry, but motorcycle life will be unkind to you. I'm only 2 inches taller, you'll need to adapt. Lowering bikes, to me, isn't a good idea. There's a LOT of compromises to be had there. I bought a lowered bike once and promptly put it back and the difference in how it rode was night and day. Putting on longer dog bones affects the travel of the shock. Either learn to ride the bike, or get a bike with a lower seat height. As this is your first bike, I'd suggest getting something with a lower seat height, then you can adjust yourself from there. One of the best dirt bike riders I've seen was shorter than you riding a stock dirt bike, but he didn't start there, he got the skills on smaller bikes.
Welcome to the world of motorcycling, take it easy and enjoy yourself while staying safe. Better to have a long riding life with lots of bikes than a short one on one cool bike.
Current Bikes:2007 Yamaha FJR1300AE | 2016 Suzuki GSX-S1000 | 1998 KTM 250 EXC | 2001 Suzuki DRZ-400E