I have melodies coming to my head and I record them, for now. I know that the path will be Ableton Live and this is somehow related to learning how to play the piano. I am not familiar with this topic so I would like to find out about:
1) What would be the best source or sources to learn about the piano as a whole (theory)
2) What would be the elements of this that I need to learn and what would be the order of this (like understand the keyboard, scales, chords, keys or whatever else could this be).

Any other info would be great, like edu sources, YouTube channels, or anything else. I basically need to figure out the best way to go. I may get something like "Piano/keyboards for dummies", find the best online course, something like this... But there can be a better book, I would need to get the best book for this. And again, also figure out what it is out of this what I personally need.

Thanks!