Plat support LF ranked team

Heya, I'm a newly plat support main (so I'm around high gold, low plat). I'd love to join a chill ranked team - so not extremely serious with scheduled practiced times and whatnot, however I am on most evenings and would like to have some ranked team fun. ^^ I play Zyra and Soraka mostly and some Lulu. I have skype, discord, and curse voice. I don't rage and am very calm - would prefer older, mature players :)