your never gona learn something by not doing it! i have never cracked a motor open before i did my own cam swap (much less seen one done). took me a bit longer but hey i did it myself and it was my first attempt and with plenty of prep it was succesful the first time around. i tossed the idea around for a good 7-8 months before deciding to do it myself. alot easier than i thought and these trucks have tons of room to work on things so nothing is really a pita to get to. there are a few special tools ya need but nothing that requires a full blown shop.
prep work is the biggest thing that helped me. i had the damn write up memorized by the time i started doing the tear down

in the end i was glad i did it myself, saved a few bucks and learned a lot, plus its easier to understand the issues that can arise with your motor when you've been in there and seen what it looks like