Simplicity wins the day! 

Learning to play piano with the right fingers and technique can be compared to learning a new language.  You need to learn how to crawl, then walk before you run.

If you're looking for a simple and fun way to learn to keep time and develop proper finger dexterity, you need to try the A Dozen A Day series, "Technical exercises for the piano to be done each day BEFORE practicing".

Well, the motto is to the point, and so are the little stick figures that accompany you through your 5-Levels of 12 exercises each.  They are very simple to follow, and each module is designed to incorporate elements in music that you'll find in just about any style. 

I grew up with this series while taking my conservatory classes.  It's nice to see that they're still around today, as I use them extensively with my students over the years.  They call it the "stick figure" book, but what's rewarding are the techniques they learn that stick with them for life.

A Dozen A Day is one of the best 12-step programs out there, and I highly recommend them to anyone who wants to be serious about their piano playing.

Sources:

1. https://www.halleonard.com/product/414222/a-dozen-a-day-preparatory-book
2. https://fr.wikipedia.org/wiki/Edna_Mae_Burnam
3. https://www.willispianomusic.com/search/search.action?_c&menuid=14329&seriesfeature=&subsiteid=264