I found this website with a Google search for hikes in the Highlands.
I'm a long-time backpacker, with many miles in the Sierra Nevadas around Yosemite, and the Cascades west of Mt. Shasta. My wife and I visited Scotland last year, staying in Edinburgh and Glasgow. Other than a train ride out to the Kelpies and the Falkirk Wheel, we didn't get out into the countryside. But, when the Coronavirus thing finally blows over, we'd like to do a walking trip in the Highlands, probably around Glencoe. I'll search in this forum for trip ideas.