IT and tech jobs in general have high demand and equally, plenty of students flocking to study and get jobs in this fields. So.... It's probably not the BEST sector to get a job... But then, I'd be a hypocrite if I didn't add that I'M STUDYING COMPS TOO!! DAMN IT!!! Ah well... I'd like to try to be a chef....
Anyways, a service manual is a DEFINITE PLUS! I've read the GEN3 manual as if it was a bible... (maybe I should try reading the bible like that..). Howstuffworks.com is great and a good start but surfing the forums and checkin' out service manuals and then finishing up with some hands on work.. can't be beat
I forced myself to learn because I'm cheap and figure it like this "Why should I pay some shmuck for some SIMPLE WORK (brakes, cv, motor oil, etc) when I can do it myself?" After that though.. I've come into the habit of feeling like this: I don't trust anyone but me to work on my car. Those bums at JiffyRape continually set people up (loose or OVER TORQUED drain plugs, loose or hella-cranked oil filters, crap motor oil, missing or lost motor oil tops...) PepLosers want to charge CRAZY fees for simple crap.
DIY cold air intake(Brungold), DIY hypergrounding(Brink), DIY valve cover paint (RedPhoenix), DIY oil catch can(...Honda-Tech.com....*sigh*), DIY starter rebuild, there's other stuff but I can't remember

As well, a FULL proper tune up for like 120 bucks with ALL THE PARTS I wanted (spark wires were some crap though). Right now I'm stuck on a DIY trans fluid change but when I get the courage, she's gonna get some nice synth fluid. DITTO for the timing belt and diff. fluid
P.S. I like how 5SFE engines in the Camry have EVERYTHING in front and within EASY reach. Starter, alternator, all the A/C stuff, oil filter, etc... Sucks that the intake manifold is a bitch to get to though.
In the end, regardless of how it could help you in the job market, it's really remarkable to just understand how a car works.