You might want to consider changing the pace of your flashcards in Anki, and not doing all your lessons at once here (after level 1 or 2). Check out “Team Taking It Slow” for possible strategies… Maybe search “Balancing school + Anki + WaniKani” or something like that. If nothing comes up, make a new thread about it in the Requesting Help section.
I feel like I’ve seen discussion on this before, but so long ago I can’t pick out a specific thread…