@GuyFawkesDay Cocker spaniel here too. Mine was toilet trained for poos in 5 weeks and pees in 8 weeks, and I think that was slow for a spaniel. It was November/December though so we were probably all a bit reluctant to go out as much as we should have. And that's completely toilet trained, as in no accidents since then (well, one I think when she got too excited).
Ours didn't like the bowl at first, have you got a snuffle mat? That kept her busy for 10 mins or so when she was little.
In my experience of a spaniel pup, the best laid plans... Roll with the punches
You can get stuff on Amazon or at Pets at Home when you work out what you need, I honestly don't think anyone can be fully prepared.