Is 61-key Keyboard Piano worth it?
I assume you’re talking about some sort of smaller keyboard here, either a dedicated piano keyboard or one which includes piano type sounds? If so, yes, you should be able to play most other styles. Also, unlike classical music and strict compositions (where things has to be played exactly as written), you can always use some sort of compromise (like an inversion or different voicing) when playing less strictly notated music. One thing though – if you plan on going to a real piano or indeed play classical piano music later on, you should definitely find a keyboard with weighted keys (like you have on regular upright and grand pianos).