First, congrats on the new machine!!! Good for you. That's a great model. I know you are going to enjoy it. Please post some pics when it comes. We want to see a dozen photos of it.
Every new owner wonders if there should be a whole lot of tender or gentle use involved. To be sure, you'll baby it a little, but gosh, you are going to simple go about using it for the chores intended. Push snow, perhaps, next winter, mow, if that's what you're gonna do, till the garden, or whatever.
Warm it up, first. That's a must, of course, but then just go do the work you want. The variety of tasks provide the tractor a variety of rpm runs.
The only thing to avoid, for 40-50 hours of break-in, is to run the tractor at exactly the same RPM mowing for hours and hours. Don't want to do that. No need for WOT either.
Also, if you plan to use the 4WD a bunch, you might do what so many good dealers recommend and drop the sudt fluid in the front axle and replace it with a quality gear oil, like a semi-syn 75w-90. Just a thought.
Other than that, don't run it with the ROPS up into the header of your garage, easy does it on hills, keep your loaded bucket low, and have some fun.