where can i find low level items to disenchant? i just started enchanting and need to lvl.

Well, depending on your level, you can usually farm greens easy in low level instances, like RFC, DM, SFK, WC, BFD, RFK. Provided you're at least level 40.

When I was levelling my enchanting, I would get runs through all of the above, and send the copious amounts of greens I got to my main for mats while my alt got xp and useful bop's.

Another way I farmed mats was through my tailoring. You can get linen super cheap on the AH in Bloodhoof, so I'd buy a bunch of the bolts, some coarse thread and make low level cloth greens and d/e for the mats.

Depending on your secondary profession, you can generally d/e the items you make as long as they're at least green and your enchanting has the right level profficiency to the level of the green item.