We have an 11 week old working cocker and a 15 month springer. Our little puppy is busy, loving, bright, and sweet natured. He grumbles if moved when asleep, but fair enough. He thrives on training and stimulation, he would lap up training all day if I provided it.
There's some clicker training books out there which I will google for you but kikopup on Youtube is a great start. She does tons of short and brilliant little training videos.
Be aware that puppies are very hard work. I don't think it matters what breed you get. I also think that what you put in is what you get out, like DC! No matter what breed.
Your DC may find the reality of a puppy a little different to the idea. Puppies nip and bite and play rough and need space etc. So it's probably a good idea to make sure your DC is 'dog savvy' too, so know not to disturb if sleeping, and hug too hard etc.
Also, just remember a cocker will need walking whatever the weather, whether it's the school holidays, whether your DC is ill. Plus, your DC will start all manner of after school activities etc, just make sure you have planned for all this.
My two dogs have given a new dimension to our lives and I wouldn't be without either, so as long as you are aware of what you are taking on, then good luck!!