fyi! The latest guidelines are WCAG 2.2! It's likely if you're 2.0 compliant you'll be most of the way there for 2.0 (if not more so as the minimum button/link size was reduced from 44px to 24px from 2.1->2.2!)
Tools I recommend for testing:
https://www.deque.com/axe/browser-extensions/
https://wave.webaim.org/
https://www.tpgi.com/arc-platform/arc-toolkit/
https://hinderlingvolkart.github.io/h123/
From a quick mechanical report on your homepage, there are some colour contrast issues that should take a moment to resolve :) :)