To answer a question from a few posts back, yes, the keys are (always) narrower than piano keys. So I would suggest not learning music on harpsichord that you wish to play later on piano. There are a few performers who play the same pieces back-to-back on both instruments, and if they're super-comfortable on both, sure. But if you can't play any piano right now, you'll grow accustomed to the spacing of the harpsichord without spending "balance" time on piano. (Although I'm confused about the access issue, because I assume you'll be studying harpsichord at a school; could you study piano there too?) So perhaps if you at least keep the repertoire separate (until you've played for a while), maybe it won't feel so weird going back. Although I have to say that many people on this forum play many instruments quite well, so there is precedent here for just going out there and doing it. Anyway, have fun! Best wishes. Remember to relax and stay loose, because extra pressure isn't absorbed by the instrument but rather by your joints.