The thing with Anki is that you cant control how much workload you have per day. Anki algorithm decides that. Say, you start by doing it little bit every day and you are fine for first three weeks. But then, Anki starts assigning you more and more repetition and that is it.
If you do less one day, Anki gives you those cards the next day on top of the normal workload of that day. There is no way out.
Worst, the less you retain, the more mistakes you make, the more your workload goes up. Anki algorithm never do the "lower workload because this person does not retain" decision. Instead, it will just give you more and more work in such case.