Richard
I'm just back from a week's fishing in your neck of the woods. I fished loch Shin , Merkland , Graham (sp) I also fished the Cassley down from Duchally power station. There is a track there which will take you to the Fion lochs which are stuffed with fish.
My biggest fish were from Merkland, best loch for bigger fish is behind Corriekinloch, my mates had nothing under 2lb, to much of a climb for me these days , they are younger and fitter than me but still took the 90 minutes to get up the hill
Lidl have a good deal on fly fishing starter kits at the moment £35 for rod , reel and everything you would need, I'm guessing your nearest Lidl would be Tain.
Cheers
Jim