The best position is fullback or winger, in which both positions requries the players to be fast.
flyhalf
wing
wing
right wing
utility back
Foward
it depends if you are good at catching if you are I would say fullback
fly half, scrum half or full back
Richard Stone - rugby league - was born in 1950.
Its appears a utility back but a good coach will advise you of the best position at this time
no of course not why would it
most 14 year olds are still growing so a definitive position can be difficult to pin point but in general, looking at the weight a position in the backs may be a good start until speed, ball handling and agility are established.