what are some of your other attributes? are you fast/agile? while size and height aren't everything - you may find yourself in the backs - your specific position will depend on your own personal strengths within the game - the backs are the offensive runners behind the scrum, if you're just starting out the coach might stick you out on the wing where you can watch alot of what goes on from the side of the play. However, if you're really have alot of upper body/lower body strength you may find yourself playing with the forwards - these are the guys in the scrum. But, again let us know what your athletic abilities and strengths are - can you jump, kick, catch really well, tackle - what other sports have you played? Then, again, just go out there to your local club and have fun - your coach and fellow players will know better what position is best for you.