I don't think those tip meters are useful however
Neither is a fuel gauge if you keep the tank full and refill it every couple of hours. And if you stay off slopes you'll never need a tiltmeter.

But I found them useful for my purposes, just as I found other instruments useful. The tiltmeter will not keep you from rolling the tractor anymore than the fuel gauge will keep you from running out of fuel. They just provide you some information. How you use it, or whether you use it, is up to you.
As for going straight up and down hills; keep that front end loader as low as possible to keep your center of gravity low.
In my opinion, it's safer to go downhill
forward and uphill in
reverse. Just remember that if you have the front end of the tractor pointed uphill, the hill is steep enough, etc., it's possible for the tractor to rotate around the rear axle; i.e., rear up and go over backwards. It's a good idea to have the tractor in 4WD going up and down slopes for a couple of reasons. Naturally traction at all four will help move the tractor, but it can also help stop the tractor. If you are going downhill forward with a load in the bucket of the front end loader, the back end of the tractor can get pretty light and your brakes only work on the rear wheels, so having it in 4WD lets the brakes also slow the front wheels.
And, of course, the best thing is to just go slow and easy until you're familiar with all the hills and slopes.