I need help improving on my support play

I am a janna main that is stuck in bronze 3, I played promos on a fresh account and I actually got placed in silver 3. The problem is I don't know how to play janna in bronze often times I max w thinking that poke will win us the game, The problem is does anyone have tips on support in general I am open to any tips and tricks as well as some support suggestions. Anyway sorry for the bad spelling and grammar as American is my second language. Bye! {{sticker:sg-ezreal}}
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