Ever notice that people who say it's easy are the same who've done it before? I understand your fears LOL.
IMO, drain all the fluids, split the tractor, *pull the engine and secure it to an engine stand. Carefully remove all ancillary items and organized them neatly on a clean table top. Remove valve cover, rocker arm assemblies and head. Rotate the engine 180ｰ (on your stand) and remove the oil pan. If the rod and main caps are NOT marked, carefully punch mark the main caps (I.E (*) - (**) - (***) and remove them. Do the same with your rod-bearing caps AND the connecting rods, and remove them next. Disassembly of the remaining engine componenets will come out easily.
*Pulling the engine keeps it mobile IF you run into a problem. You can take the engine (block) to an independent diesel mechanic and ask (pay) for trouble shooting and get the 'how to's. While the enigne is there, you can also have them measure the rod and main journals on the crankshaft and cylinder liners. This WILL prevent you from ordering the wrong sized parts (standard) in the event the crankshaft has been turned before or the cylinder walls and rings are oversized (from standard). If you work clean and keep everything organized, reassembly is a sanp when you have all the torque settings with your new parts.
Good luck... oh, and then when someone asks the same question you have, you can tell them it's e a s y?