Howdy, and welcome to the group! You have brought up several questions that the typical new owner will ask, so here goes. The engine on this bike likes to rev high. At highway speeds, you're gona be taching up into the 5000+ area. That's normal. Lots of new owners and veterans alike are often looking for a 6th gear.
If you feel vibrations at higher rpms it might be several things, wind resistance, tires, carbs needing balanced, or maybe its just the road. If you rev the engine over 4K in neutral, does it vibrate excessively?
The tach has a wobble that every bike from day one has. It doesn't make sense that the speedo doesn't wobble in sync with the tach, but it doesn't. Tach does the watoosee while the speedo does the shuffle. That's the way it is, get used to it.
Temp gauge will run up to about midway on the meter if you are doing a lot of stop and go, or slow riding, especially on hot days. Under normal highway speed cruising it usually will drop a notch or two. Usually when the gauge gets around halfway, the fan will kick on if you're sitting still or barely moving. All normal.
If you haven't done the normal "new owner" maintenance to the bike yet, I would recommend looking for OldHossCanada posts on here and click on the link at the bottom of his signature and it will give you plenty to read and think about, for getting the bike in tip top shape. Also, you'll want to check your final drive/driveshaft splines ASAP. That procedure is in the bottom of my sig.
Great having ya! Enjoy the new ride!