Vortex Sound Research

I am hoping to start making music soon, I have the ideas for it but I am centered on getting gear. I am torn between getting a synth or piano first. Both digital keyboards, but synth will either be semi weighted keys or non weighted (please tell me recommendations for whichever one) and weighted for piano. I have limited money, so one is going to come before the other, and I don’t know which to prioritize, as it may be a rather larger window between when they are both bought. Thank you!