a) Pick an artist and listen to "<Artist> Radio", which will quickly compile a playlist of music by and similar to that artist.
b) Sample some "Stations", which are usually themed around a genre, mood, or activity.
As I'm listening to the above, I'll Thumbs Up songs I like, which adds them to my library for more frequent listening later, and helps me to "bookmark" a new artist to browse the rest of their songs later if I want.
Instead, I have to right-click a song and choose "play a radio-station-thingy based on this song" (which usually is a stretch anyway and most of them are nothing like what I'm looking for), and for the few songs I do want to keep, I have to right-click them, find the "add to playlist menu", find the submenu item for the right playlist and click that, and try to re-find my place again in the song queue to start this all over again with the next song.
Maybe it's because I'm used to 90s software still and so I just don't know where the right buttons are, and I'm just clicking the wrong things, who knows.