Mid Main looking for tips

Looking for higher lvl caliber players input on my runes/masteries for champs. And just train me in the way of "Faker" [slayer-jinx-wink] Also need tips on how to improve and get better mechanics ;-; the only thing probably thats keepin me silver 1 Ill admit it! . Also game sense but I guess ill admit that too*[slayer-jinx-unamused]* before any of you say otherwise. Just a guy trying to improve as a mid main. (Coming from an old adc main)