i cant recommend any 4wd courses (i've considered doing one, but the price put me off as i'm only a student).
i learnt from going out with other 4wd'ers, asking plenty of Q's, and finding out what your car can and can't do by simply attempting things.
the main thing is to not be afraid to ask how to do things; everyone here is willing to help if you need it, so just ask.
if you want a good course that has a mix of hard and easy (where you can choose whether you want to take the easy or hard tracks), then join us at the next mundaring meeting which shouldnt be too far away.
if you want something a bit tamer, then i can recommend lancelin dunes. good fun, but go with an experienced mate or two as no one wants to get bogged by themselves haha. it can be all good fun if you're sensible, but can end badly if you go flying over the dunes and dont watch out for other vehicles. dont go attempting steep dune declines without being shown and told how to, and if you dont reckon it looks like a good idea, then simply dont do it.
4wding...its mainly about common sense and knowing your limits and your cars limits.
get out there and have fun!
