im having troubles with this

i need help playing idk if i want to main adc or mid like i like adc but i also like mid im prob better mid with fizz but i like being adc so i just want people to play with id like one of those two spots but im s4 now i think and idk i dont want salty or tilting people to play with lke no joke its no fun when u quit cuz someone last hit that champ in the last 5 minutes of a 50 min game just add me swaflord look me up tell me what im doing wrong please anything idc i just wanna get way better at this game