Go to onion icon (if it exists?) -> Network Map. See the panel that says Connection and Status? Do you see a bunch of relays listed there? This tells you about the circuits that Tor has built, or is building. There should be some lines with three relays listed in each one, and they should say Open. When you try to access a web site in TorBrowser, what happens to the circuits in that list? Do a bunch of them say Connecting? Do the say Closed? What words do you see there?