I do most of my own maintenance. Get all the proper tools like filter wrenches, funnels, drain pans and the like and make sure everything fits where you want it too. If it's your first go round, give yourself plenty of time and relax. If you follow the book step by step it easier than you think and very satisfying to work on your own stuff. I keep old throw rugs around to lay on while I'm on the floor and carboard to put under the tractor, just in case. Clean around any caps or plugs to keep stray stuff from getting into the engine. I magic marker the dates changed on all my filters with the hours as well as keep it logged right in the owners manual. Quick reference right on the tractor. Wipe everything down when you're done so you know if it's a leak and not just a drip from the change. With the money you save, go buy some nice tools to make the next time even easier.
Enjoy!