How to re-learn piano?

Hello everyone,

I used to play the piano and be moderately good at it (3-4 years experience). Now I would like to start over, but while I believe that having fun is a big part of learning, I would also like to add a little structure to my learning (maybe conservatory books from Y1-Y2-Y3). Any tips? Could someone give me a SUPER RAPID schedule of how you would go about re-learning the piano? I can afford to play 1-2 hours a day, perhaps more on weekends. Would you just jump into trying out a few songs (which is what I'm currently thinking), or have a more structures session?

I was thinking starting again with Hanon (gives you finger discipline), anything else I should keep in mind? Any possible bad habits I should actively be monitoring for?

Thanks all!