1. Learn Japanese. About JLPT3-4 should be enough. All that matters is your listening ability.
2. Recognize voice actors. Hopefully you'll see a few popular ones in the cast (Sakura Ayane, Hayami Saori, Toyama Nao, Sugita Tomokazu) as well as liking a few of them (for me, Uchida Maaya and Itou Shizuka).
3. Play the anime during a time when you're not devoting 100% of your attention to it. You could be studying, working, doing research, or playing a game.
If you can do the above, you'll find that your enjoyment of the anime will actually be quite decent. Instead of playing the impossible game of getting to know the characters (you don't even see their faces!) you instead play the much more fun game of listening to your favorite famous seiyuus voicing all kinds of different scenarios: slice of life, comedy, fight scenes, (bad) drama, you name it. Seriously, that seiyuu lineup is stacked. Instead of being extremely bored of the story, you'll be trying to piece together the story from dialogue - which is a fun task, kinda like listening to an audio book.
In the end, you'll walk away from the show rather pleased that you got to listen to your favorite voice actor/actresses make nice sounds without having to pay much attention to a story that amounts to nothing.
I would never watch this show in my free time.
