No sites off the top of my head, I just tend to stumble around the web reading material as I find it.

Profession is farming and anything related (welding, class 1 truck driving, agronomy, etc..). Electronics is a surprisingly handy skill to have as well when you need to fix something out in the middle of the field and the boss(es) and repair reps sent from the dealership of the item all dont know how it works, lol.