is garen a good champion for ranked games

so i'm a new player to LOL.. and i'm level 29 now. Which means almost 30, which means ranked games become available. I'm wondering how people in ranked games look at Garen, and if he is played often etc. Do people get diamond( for example ) with Garen main a lot? I love playing Garen but not sure if he is strong in ranked games. I really don't want to get stuck in bronze as i read a lot online
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