Tips on improving?

(Sorry if this is in the wrong place, seemed logical to put it here since I am more or less a new player lulz) I've been playing league a while now but I feel like I'm not getting any better. I do what I can: play every day, try and analyze my mistakes after matches, watch educational LoL youtubers. I want to go ranked but I feel like my skill level is nowhere near good enough (as evident in my match history.) Could anyone offer some more tips? (PS: I'm an adc/jungle main if it's any help.)
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