i cant start ranked team game its hide or idk

What level are you in the game? You have to be level 30 and own 16+ champions to play.

Ranked team games are only available at certain times of the day. You can check out this schedule to see what times of the day they are available in your region.

https://support.riotgames.com/hc/en-us/articles/209964886-Ranked-Teams-Schedule