SHOULD I LEARN KEYBOARD OR PIANO?
Is there a difference?
Actually, there is. The lower end keyboards are not 'touch sensitive', which means the sound produced has the same intensity, regardless of how the player presses the key. With a piano, there can be great differences in the sound produced, depending on how the the key is struck. This allows for infinite nuances of expression, which is why it is the instrument of choice particularly for classical music study. Higher end "digital pianos" can feel equivalent to pianos and have many other bells and whistles as well.
However, it is possible to learn the rudiments of music on a lower end keyboard. Notation, timing, tempo, music theory and the ability to play piano pieces, both contemporary and classical, can be achieved on a keyboard. Then if a player shows promise, the investment in a good quality piano, and a commitment to further years of study with an experienced piano teacher becomes a good choice.