I know what its like to hate your job, the way i look at it is that the stuff i like (music) balances the stuff i dont and thats part time chemical warehousing and studying. I think you need some sort of balance to stay sane hehe. otherwise you take the good for granted.
All the occupations youve mentioned aren't that easy to get into because they are pretty full, hard to come by or u need to know people who know people who know even more people. And then u need to be good and have experience which is the catch 22. its hard to get experience if u arent employed in the field, the courses might give a bit of leverage here.
I'd jump at the opportunity to get a sound job in film and tv. especially tv. even mixing the nightly news would be good
The thing about all the technical terms is that you have to bear with them. Eventually you'll figure out what they mean because you'll get bits of info here and there.
magazines will use these terms but sometimes may have definitions for them.
some mags to check out are Sound on Sound, Future Music, Next Music, Audio Technology and so on.
some websites to check out would be (not exactly sure what you need tho):
http://www.tweakheadz.com/how_to%20articles.html
http://www.futureproducers.com/forums/ (message board)
http://www.intermusic.com/defaultfeaturearchive.asp?FeatureType=TUT
http://www.dancetech.com/aa_dt_new/index.cfm
If you get into any technical terms that u dont understand/cant pickup just ask on a message board.
Also, note that theres heaps of adds all over the net/magazines from gear/software manufacturers trying to hype their shit. if u need to purchase anything, make sure you check out user reviews and ask around before you buy. theres often good deals in the trading post or on ebay.