How to choose the activities for the right day?

[link]

Im new in the game and for me all activities that I choose looks that not is the right, sometime its good I do not understand it lol

and one more question what happen when completes the year and finishes school in the game? xD

[pathfinder]

just focus on the activity that is lower, I also missed some and get triangle or X. xD

[na00]

There's not a right activity for each day or time, no matter what you do, the result is completely random. Just focus on getting enough hearts on each parameter.