Have you already read through any of the guides on how to manage your WaniKani workload? Such as keeping your Apprentice items under 100, how many lessons per day you should do, etc?
One of the great things about WaniKani is that you get to decide how much time you put into it. Reviews are the most important thing to keep up on - if you find yourself feeling overwhelmed, cut back on lessons and you will free up some time.
Also, here’s a link to some great info in case you haven’t seen this one yet 