You have so many great options to choose from, however, I did the heavy lifting for you. IMHO the P45 is the lowest-cost, 88-note, weighted-keyboard digital piano that Yamaha offers. This digital piano has a basic set of features, ideal for the needs of the beginner piano student.
I’m still working on this one… Once I have found a valuable “most-bang-for-my-buck” sheet music website, I will let you know. Best if you sign up for my exclusive content signup list.
If you are seeking the best printed piano book for a child, which is specifically tailored towards a beginners mind set, check out this product.
Currently, I’m still evaluating the best piano bench and will update as soon as available.
Talking to piano teachers about their experiences with metronomes and will post about them soon.