I want to play ranked
I recently joined league of legends (3-4 months ago). I've been reading all the things that people say newbies should do before they decide to play ranked like having 2 or more champs that they can play in each role. I have that and I can play them reasonably well. I also have 2 general rune pages with tier 3 runes and my mysteries are in order. My favourite role is support>adc>mid=JG=top so I know a lot about the importance of wards and other things. My mechanics with my champs are also good. I think I have played about 350 games so far. Is there anything else I should know before playing ranked?