Does anyone use Leetcode Study plan? I am using DP 1 study plan. It's a 21 day plan with like 60 questions. In one day I did day 1 and day 2 but from Day 3 all the questions are locked. Anyone knows how to unlock them? I want keep moving without even waiting for 21 days to finish.

One more question. I am preparing for Google virtual onsite. I have about 3-4 weeks time. Any suggestion on which set of problems I should be preparing these days.
I have done top liked 100 questions and now doing Explore - Google interview question.
Any suggestion would greatly help

Thanks