The good thing about rugby is that it caters for all shapes and sizes, in fact sometimes it is better to be shorter so that you can get lower on the tackles. However, unfortunately, most county/ proffesional clubs do judge people on their size, though by far the best player on pur team is also the shortest. So, unfortunatley, you'll probably have to be twice as good to get noticed half as much. One thing you will have to do is to go to the gym to bulk up, big teams do often like that too. Put simply if you are good enough you'll get in, but be sure you are playong to the best pf your ability in order to get noticed.
height dosent matter really what matters is the position you play, you could be a small,nimble and agile player and of coarse you could join a club go for it, have some fun