Since it's your first engine pull, approach it with a bit of caution and care. Take the time to label things and if possible take lots of pics or a few seconds of video. It really is simple, but some things that may give you a little trouble are things like the heater hoses, be careful not to get too forceful with them, or you may get to replace the heater core. Rusty old exhaust bolts are always good for some skinned knuckles and bad words, and I wouldn't even consider taking the engine and trans out together, especially since there's only six bolts and three nuts holding them together and they are relatively easy to get to. Keep lots of oil absorbing stuff around like rags and kitty litter to immediately clean up spills and be sure to drain as much of the coolant and oil out of the motor before you yank it. Any crisis that you find will most likely be quickly answered by someone in this forum, since we've all been there. Good luck!