Hello and welcome to COL.
I can't really advise, but can explain that I own a wonderful orange roan Cocker called William, who is nearly 5 years old, who may or may not be a carrier of PRA, or be affected by it, or be clear. His dad was tested when the DNA test became available in the UK and is a carrier, but William was already a few months old then. His mum wasn't DNA tested as she'd already had the litter by then and wasn't going to be bred from again.
So I have a dog whose PRA status is unknown but who could potentially be affected. So far I've chosen not to have him tested as there's nothing I can do to change his status and he's not used for breeding and never will be.
I don't spend a lot of time worrying about it, but it does come to the front of my mind sometimes and I hate to think that he might go blind, although I know it's not an impossible situation as I had a very old Cocker who lost his sight to cataracts and he adapted well. But if William is affected it could start to take effect quite soon, while he is still young and lively.
If I ever have another Cocker in the future I will definitely make sure it comes from a breeder whose stock are DNA tested for PRA and FN. My personal opinion is that every breeder should make use of the testing now that it's available.