new mouse new gameplay

So I've been playing league for a awhile now back in 2010 with my first account. Over time i have used many computers to play league at first it was pc's but then it transferred over to mac's and what not. After a month with a mac the mouse broke and i was forced to use the trackpad which i honestly didn't mind and so for 3 years i have played league with a trackpad and had a decent time doing so. after some time i dropped a single drop of orange juice on the trackpad and it went out of control and no longer works. So i was forced into buying a new mouse and play on that which i have to say sucks ass. I went from being a decent player to one who can barely cs now that i have to play with a mouse it's mainly the camera that fucks me over and how it just feels clunky. I feel one of the problems is that I'm not actually using a mousepad but a plastic table mat, but even then i just can't get that feeling of how the camera doesn't react well enough when in a tough situation like when i get ambushed or caught out or how I'm not able to properly target certain people because I'm not used to the mouse. I'm honestly just feeling really conflicted and afraid of actually going into ranked and such. It also doesn't help that I'm ADC main and i rely on A moving my way in fights or kiting which kiting I'm having a really hard problem with also. If u guys have any suggestions on how i should look at this problem please comment that would be nice :)