How To Gain Speed In Rugby Gaining Weight, Speed, Skills In Rugby?

Gaining weight, speed, skills in Rugby? - how to gain speed in rugby

I am a 16 year old boy playing rugby at school level. I'm 5'8 ", approximately 68 kg. I wonder how I train, I train for speed? Agility: Strength: Strength: Power?
Of course, everything, but how? They should focus on a particular aspect of a month? and change things, or at least a little every day / every day than another?
In addition to answering the question: How do I would be very grateful if u with perhaps the best way might give you a sample, are handled, stronger, faster, more agile, etc., etc.
This is all because I'm bad I'm not in the rugby sense, but I take my level a little more ...
Thanks