This has not gone too well for the last week because I had several midterms, but hopefully I'll make up for it this week. Whenever I had time I tried simple brute force/meet in the middle problems.
515B - Drazil and His Happy Friends
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1249C2 - Good Numbers (hard version)
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769D - k-Interesting Pairs Of Integers
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As for the plan I decided I will now mostly focus on solving harder problems since speed doesn't seem to matter that much at this level. For the basic techniques section that I need to practice DP, Two pointers, Range queries and Bit manipulation which I am not very familiar with.