The track is MANY miles down the road for you. It's great that two weeks in you are already thinking about continuing your education with the advanced course and track days but I think you need to slow down a little.
Yeah, a GSXR would not be my first choice for a newbie bike. And being tall is no excuse because those things are cramped. But, you have the bike and you love it and it makes you feel good. I would venture to say that the thing you should be MOST respectful of on that bike is not the power; it's probably the brakes. There is no ABS, there is no built in understeer. If you jam on the brakes that front end is going to tuck and you're on your face in milliseconds. Take that FWIW.
The weird feeling doesn't go away; that voice telling you that this is probably a bad idea is always there. The thing is, after a while you react to it differently. You say 'screw you, I can do this!' And then you do.
It's not the same as survival instinct. It's just motorcycle instinct.
Take your time, don't do 90 mph everywhere you go.
Watch your 6,9,12 and 3.
Be nice to people in cars if you can; you are now an ambassador for motorcyclists everywhere.
Remember that being nice to a cager doesn't mean they won't try to kill you.
Wave at little kids.
Wave at hot chicks but only after checking for parked cars in front of you.
Listen to the old guys, just because they don't ride fast doesn't mean they can't. It means they survived to ride slow today.
Avoid medications while riding.
Carry water.
Do your scheduled maintenance.
Take care of your chain.
Tell your mom you love her.
Bake me some cookies.
Never gonna give you up.
Never gonna let you down.
Never gonna run around and desert you.
I think that covers it.