Update KeepTrackofStudyTime

Basics of it are completed, nothing fancy but I got it working.

After being frustrated by the NaN error for a billion years I finally found the issue on my own and corrected it. See in previous versions I kept trying to define a Variable by using the same Variable in an equation. This resulted in a continuous and annoying NaN error. Finally I tried defining the variable earlier and then using it much later and the whole thing came together.