One of your first stops should be Crieff Visitor Centre. Here, you'll be able to orient yourself and get lots of useful information before you begin exploring.
This tourist information center in Crieff comes recommended by travelers, so make a spot for it on your travel itinerary. Don't think the sightseeing ends there, however. There are plenty more attractions ready for you to check out after Crieff Visitor Centre. Famous Grouse Experience at Glenturret Distillery, Comrie Croft, and Drummond Castle Gardens are nearby.