I agree that registered stock is a good choice for someone first starting out. There are a lot of people out there selling goats that are not as concerned about the health and well being of their goats. There are a few diseases that are devastating physically for the goats and emotionally for the unknowing owner, and unfortunately you can't always tell by looking at the goats. These diseases are very preventable but require ongoing testing and safety practices to keep the herds clean or disease free. Many people who breed registered stock are involved in showing, or breed improvement so testing is a productive practice for them and the future of their herd. Although this is not always the case, and many people have healthy animals that are mixed, or grade, or whatever. A lot of people that get goats find themselves wishing their girls were registered at one point or another down the road, so starting out with registered goats solves that problem too. And look at the price of goats in your area if someone is selling goat kids for $25 and most are going for $125 ask yourself why, unfortunately there is often a reason that the breeder isn't going to tell you. If the goat looks shaggy like a dog after a bath it might not be a good pick. In my experience a shaggy dull coat in a kid has always been a sign of something wrong with the goat. Goat kids should be smooth or fluffy not shaggy. And I haven't met a goat who didn't think she was beautiful, they are very full of themselves, so a hunched over goat with its head and tail down is normally a bad sign, a healthy goat wants you to look at it and holds its body like that's all you came there to do, cocky and spunky body language is a good sign, but aggressive body language not so much. That was way too long... I'm sure you've done lots of research and these are just a few things I wish I'd been told when I first started with goats. Maybe its obvious and repetitive stuff but maybe it will help in some way? Either way good luck and have fun!
3 seems to be the magic number of goats with just 2 you risk one being a bully and one being upset and depressed plus if something ever happened to one goat you are left with just one very lonely and loud goat while you scramble to find her a buddy. You always try and keep them safe but kidding is never 100% safe and either is life when your a goat that looks tasty to predators and fun to roaming dogs.