I only started FF last year, though I've been fishing on-and-off for 50 years now. I fish the local reservoirs here on the Isle of Man: all but one would be considered a small stillwater, I think. No boat fishing allowed.
I started with a 10' 8wt kit as advised by some locals, and nearly gave up: fortunately I broke the rod tip, and took the TFF offer of a 9' 5/6 wt rod with the subscription. I've never looked back! The lighter tackle is much less tiring to use and is capable of subduing any fish I've seen here (my PB is 9lb, but they run to double figures here). The rods I now use are capable of casting much further than I am, so I see no limitations set by the tackle.
I recently bought a 10' 4wt, which is a very pleasing combination, too. The 8wt rods (even the 9'er I bought to see if length mattered

) never see the light of day now.
YMMV, but I'd recommend you at least try the lighter tackle and see how you go!
Paul