i want to git gut at her and enjoy playing again

i used to play her back when she released and leveled her up to level 7 but then the nerfs happened and other heroes released

i want to get good with her again, hitscan in general but i physicaly struggle with the flicks and my sensitivty got fucked when i reinstalled the game, also idk what crosshair to play with her since i lose the green dot when playing her like a shotgun

i would like from people with hands and good aim unlike myself some help to get to play her not super crazy but atleast be able to defend myself against a spiderman or a bucky or wanda since i cant

my sens are 6,65 and 7.64

due some health issues my finesse motor skills diminished i feel like when i try to aim i grip the mouse with the tip of the fingers and my writst gets locked,

any ideas to get going with her again please? even if im just mid i want to be able to just land my shots and reach lord with her please

i tried just practise but its harder now so any good tip or tech would work please