When to try ranked

Hey everyone :) As I posted before I have been playing since Jan 2019 and my ultimate goal is to play ranked and not be a terrible burdon to my team. I enjoy playing support I used to play Lux but have since moved to Leona as shes a bit more useful :) So my question is: When did everyone start ranked? I dont feel I am good enough but I am always reading and watching vids etc to try and improve (and bugging people on friends & here!) I dont want to be "Carried" I would like to do it all off my back.
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