I have been using Thunderbird for fifteen years. But have held back on updates (for a reason) and am using an older release. Just now (for a different purpose} I downloaded and installed Thunderbird 68.9.0 on macOS 10.13.6. Perfectly normal macOS installation. Thunderbird opened with a single tab, Home. I set up an account. I then clicked Get Messages. After a short time, Thunderbird reported at the bottom of the window the number of messages downloaded. No inbox or mail folders are displayed. Using the two icons on the upper right, I opened Tasks and Calendar tabs. Using the interface and the macOS Thunderbird menu, I see no way to get a tab--or anything else--that shows my messages. I have tried Menu>View>Layout>Folder Pane and Menu>View>Layout>Message Pane. I've tried Menu>View>Folders>All and Menu>View>Folders> I have tried Menu>Go>Folders>[e-mail address]>[e-mail address] and Menu>Go>Folders>[e-mail address]>Inbox. I have tried Menu>Window>Mail & Newsgroups. I have searched Mozilla Help. I have read https://support.mozilla.org/en-US/kb/thunderbird-faq#w_where-can-i-get-help-with-using-thunderbird. I have read https://www.thunderbird.net/en-US/features/. I have looked in http://write.flossmanuals.net/thunderbird/interface/ and in http://write.flossmanuals.net/thunderbird/reading-and-organizing-mail/ and elsewhere at FLOSS. I have used DuckDuckGo. I have looked through all the Thunderbird macOS menu choices two more times. I find no way to display a message, a folder, the Inbox, ... Please first state your opinion of me, then tell me what to do, then state your opinion of two things: How Thunderbird presents itself after a new install and How Thunderbird help and support pages help and support a new user. Thanks for your time, dear Reader. Cordially, Joaquin