You can actually learn all of these by venturing through the forums and learn it all yourself
But I can give you summaries :)
How clans work :
Clans work is almost the same as "Squads" you know the group of friends?
How battles are done :
Basically they challenge each other. After that they animate themselves fighting their opponent (the one who you challenged). and then they post their animations at the battle zone where the voting is done. Lastly the winners are picked based on their amounts of votes.
