I'm afraid I found selecting sets to be very unclear, and I only figured it out by poking around the interface until it let me press the button Edit: I didn't

I'm afraid I found selecting sets to be very unclear, and I only figured it out by poking around the interface until it let me press the button Edit: I didn't realise there were multiple modes either until I stumbled upon that as well anyway drilling vocab/characters isn't the same thing as learning a language