Welcome to the forum bud.
I believe you are just a nervous rider on your new, to you, bike.
Once you have put some miles on it, you'll not notice the weight and indeed you'll automatically know what gear you're in. You'll get used to the engine braking which will help you know your gears.
I'm only 5'8" and used to cut about on an xs1100 then an xjr1200, both big heavy bikes. Once I was used to them, the size and weight issues disappeared.
Enjoy your bike matey and ride safe