Hi i use to be a mid laner back in season 5 but i stoped because i was an ignorant and didnt wanted to keep a small pool but i wanna go back to mid laning i was just thinking if i should only stick to these 2 champions for mid lane 
and another thing 2 is how can i roam to other lanes i cant roam when i play mid lane i dont understand when to roam to another lane as a mid laner any tips
Honestly, playing mid right now compared to Season 5 isn't that much different. The most important thing for you now is probably to update yourself on specific matchups. CSing mid is still the same, roaming to other lanes is also still the same, wave manipulation really hasn't changed much mid. I'd say every role had a lot of shake-up over the years except mid. Your picks, both Ahri and Annie are both fine in the current meta too so I wouldn't worry about that.
You roam whenever you already got more cs than your opponent or you got fed. Or you can roam bot whenever you see low hp enemy lane pushing your ally bot. Ahri can carry I think but there are better mid laners.
I like to roam until the enemy mid-laner has died/backed and I a have pushed in the wave. Also don't forgot to help the jungler contest scuttle! It means a lot to us.
i forgot how to play this game! can you teach me how to play again?
