As these chaps say, where you end up playing is wholly developed on your skills. What are you good at?
Well it depends on your pace and agility. I think we can safely say that at 4'11" you're not going to be put into the second row though!
I'm quite agile and am a good passer
You sound like a scrum-half in the making! Perhaps wing if you're a good sprinter too. Somewhere in the back line I guess.
You playing 15s or 7s?