Too short of time per day even though hitting goal percentage?

So far, I’ve had a goal to do 1.8-2.1% of the Themis bar prep per day and have been hitting the percentage within 4-5.5 hours. Should I be concerned? Should I be doing more practice problems? Reviewing more? It just feels like such a short amount of time. I’m at or above the target goals for multiple choice so far.