Guidance for further problems

Hello everyone, so I am going to start college in July and have decided to start doing LeetCode properly. At the moment, I started with monotonic stack and have completed around 15 problems (2 ez + 13 med) and overall, I have solved 62 questions total as I started in the beginning of 12th grade. I solve around 2 - 3 problems daily and keep my saturday and sundays for revising the questions and pattern. Now the rest of the monotonic stack problems are either Premium (i dont have), Binary Tree & Linked List or some other topic that I haven't studied, and Hard ones. So what should I do now. Should I learn the new topics to a low extent and solve them (kinda pointless imo), Start trying the hard problems, or Switch to a different pattern like "Stack" and start solving those questions?