Playing with very high level friend and getting matched up with high level player in normal game
So I am very new to league, and I have been playing support with my friend. I am level 30 while he is Diamond, and we win a lot when we are playing so my MMR is artificially inflated. I play mid as I am playing alone and I get matched up aginst very high-level players and get destroyed. How do I get it down without being destroyed in normal games a couple of dozens of times?