Dota 2 player learning League for a local tournament. Need help.

I already have a team set, the people I'm with already know how to play league. I just need to learn in time. I have aprox 15 days.

Here's my dota profile (not sure if it'll really help any): http://www.dotabuff.com/players/95846228

I will be playing ADC for the team. Any and all advice would be appreciated. I have played league before nothing extensive though. League name is the same as my dota one. I've so far been learning Sivir. When I played possible a year or two ago I played support.