Fwaaaark mate, of course you can teach your self. Don't listen to those dickheads that make out that Oly lifting is so hard its nearly impossible to do, that's bull shit. The main thing to remember with Oly lifting is that its about using technique along with strength to move the weight in the most efficient way possible to complete the required lift.
If your gonna do it for training than as paper clip says, post vids and get feedback on your form, if you want to compete later than get some coaching as you will be going up against people who are doing this for more than staying fit, they want to beat your ass so they will perfect each lift as much as they can. So many faggots say Oly lifting shouldn't be done without coaching ...PFFFFT, tell them to harden the fuck up and do it. You won't learn how to perfect any lift without doing it.
JUST REMEMBER TO USE COMMON SENSE, DON'T TRY TO SET RECORD LIFTS UNTIL YOU HAVE THE LIFT DOWN PAT AND CONSISTENT.