CONGRATS!
Someone on here was giving advice (for making the right choice of model) to sit down and make a list of all the things you would like to do with it. If you are married, your wife will likely enjoy operating the "H" model you ordered, as well.
The 1.7 liter A1700 engine is a Cummins product. It starts easily & runs smooth. You will find it has far more power than the chassis really needs!
At 3,014 lbs., you may consider adding some weight to the tractor if you will be working it hard. The loader adds about 700-750 lbs? A "ballast box" (basically, a box or drum filled with rocks/gravel) in the rear will offset the loader bucket when carrying heavy loads. It won't be needed if all you ever do is mow lawns, though.
Mine almost always has something attached to the back: Box Blade, Post hole digger, carry-all, boom pole, pasture shredder, trenching ripper, etc. etc.... I use it almost daily!