Get in to an obedience class too, getting an obedient dog would be first and foremost, then move on to stuff you will be using in the field. @ 8 weeks just start with fun retrieving, don't correct him, just praise the hell out of him when he does something right. You just have to show him what you want, there are a million different views on training protocol and you will just have to pick which suits you best. There are a ton of good books as well.