[Highland Park] Authorities on Port Authority bus system

We're in need of some help! Having not had much experience with the Pittsburgh mass transit system, I'm trying to navigate the site to determine the best route to take from Verona to the North Shore (National Aviary, specifically). We may be moving to Verona because we need to expand our living space and a good deal was found, but, being a one-car family, we're exploring our options for alternate means of transportation. I'm a bit confused about the bus schedule and its routes and was wondering if anyone knew more about this or has any tips for navigating it. Thank you! Heather