I just hit level 30 and tried a ranked solo queue. In the first game, someone didn't pick a champion so I was put back into the queue. In the next game, I was team captain and had no idea what to do.
Is team captain chosen randomly or was I in a room of first ranked game players?
yes it is random how ever there is a higher chance of getting team captain if you are a party leader in duo que. basically you get the role you want due to pick order , or the higher you are the more priority you have for a role. and you ban. if you dont know who to ban ask your team or you can be selfish and only band for yourself if you think you can will lane and carry
Play a few normal drafts and get used to the banning system before diving in to ranked :)
Also, I feel obliged to recommend that you make sure you have champions for every role and at least an AD and AP rune page full of tier 3 runes.
