Springers and cockers come in show and working lines. The working lines look different from the show lines and they behave differently too. The show lines, on the whole, are more chilled and less energetic. The working lines are very trainable, but they can go all day. They are very driven to get their noses down and hunt for scent, and follow it when they find it, so you need to train them if you don't want them buggering off beyond the far horizon in search of rabbits. And you don't want them buggering off, because that is how dogs get into trouble, cause accidents and so on.
Sprockers are usually (IME) produced from working lines. If you are happy to get a very full-on dog as your first (and I'm not saying you shouldn't, only you can make that call), they're worth thinking about as in the right hands they can be really good dogs. However, if you have zero experience of owning or living with a dog, you might want to think about this quite hard. Personally, a sprocker is the sort of dog I'd take to gundog classes and spend 15-30 minutes training almost every day of its life from 8 week to about two years.
You'd also want to consider what health tests you'd like to see the results of for sire and/or dam, and what the breeder is trying to do. Is he or she producing a litter to keep one as a beating dog with the intention that the others should mostly go to working homes?
I'm not trying to put you off getting a dog. I'm just trying to alert you to the pitfalls for getting a working-line dog as your first.