help! still struggling with aim

hey all, in need tips on improving aim (xbox)

a little background, i started playing with my son back in may or so, i play on an xbox. i am not really a gamer per se and my prior video game experience has been limited to OG nintendo and sega genesis 20+ years ago

anyway, i find it incredibly difficult to use the controls to aim. i feel like its just a crapshoot any time i hit the aim button left or right, up or down if i'm actually going to land the crosshair on the player i want to shoot at. 9 times out 10 i die simply because i just keep overshooting or undershooting the aim button until i can finally get on the target and by then i'm already toast because the other players seem to just hit every single one of their shots, doing crazy damage with each one, while also moving around like maniacs somehow while i'm probably standing still or slowly walking trying desperately to actually get the crosshair onto them.

i know a lot of good players use PC, i definitely feel like aiming with a mouse would be much easier (i assume that's how they would aim) but just wondering if anyone has advice for an xbox controller. I've tried playing around with settings but it hasn't helped much. I've done some of the aim maps and also use a dummy account to play a lot of bot lobbies but even with the bots i miss tons of shots because i just can't seem to get reticle on them without taking 3 or 4 tries back and forth with the button.

any advice would be appreciated so my son (who is inexplicably good at this damn game lol) doesn't have to continue to carry me in every match