Instead of just stopping in the parking lot at Loch Achtriochtan and taking a picture of the bridge and the Achnambeithach Cottage, it's worth making a detour across the stream and taking the well-developed path along the watercourse to the waterfall. There is only one place where you should perhaps share hands, the rest is also for inexperienced hikers well feasible.
The waterfall is bigger than it looks from the valley and the view from the top is worth the climb. With a little luck you will also meet one or the other sheep at the waterfall.