I've only done grades 7 and 8 on recorder, not all the build-up, so can't compare with the grades which lead up to them. You'll be getting a more solid basis to your playing than I've had - I was self-taught for a long time before starting lessons three years ago. I'm very glad to see there's another recorder enthusiast out there.

The more, the better chance it has of not being sidelined as a "not serious" instrument.
Piers' playing is astounding, and he does workshops round the country too. There are plenty of others for inspiration too - Dan Laurin, Pamela Thorby, the Amsterdam Loecki Stardust Quartet, Marion Verbruggen, Frans Brüggen all spring to mind, and I'm sure others can add to the list.