Time Machine is tricky for many users, me included until I learned a little trick.
I open a non-fullscreen Finder window in a blank desktop and then invoke Enter Time Machine from the menubar. Once TM has opened using the Finder window that I have provided, I can browse to anywhere that I want to go and then return to the time of my choosing.
Late 2012 Mac mini, macOS 10.12.6; Watch, watchOS 3.2.3; iPad Air 2 & iPhone 6+, iOS 10.3.3; TV 4th Gen, tvOS 10.2.1; Airport Express