How do you know?

Well I've been playing the violin since I was 10. I'm 14 now and just recently decided that I wanted to play the cello. I already had one since I attempted to play it a long time ago and gave up. I got a book for beginners and learned every b clef note and first cello position in about 30 minutes. After about an hour I was almost done with the whole book. I guess it just depends on how much drive you have. But you should go for it! It's easy.