My advice is?
Dont go to a fishery that is stocked to the brim or is a hole in the ground?
Why you say

because you wont learn a thing about flyfishing

I started at a C/R water, which is pretty tough cookie at the best of times and ive learnt more from fishing that water than i have ever fishing put and take waters.
You dont need to think about flies, tactics and water craft in PT waters, 9 x out of 10 times you can catch on any lure

remember you dont learn from doing right ,but doing wrong

Grasshopper

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If in doubt, get the montys out
Intelligence is relative to your environment