On rhythm, get a metronome or play to backing tracks... Sausage fingers can be beaten... it's all about training them with thousands of hours of callous forming punishment.
I used to sit in front of the TV and noddle away for hours (without amp!). I got the practice I needed, and the family didn't feel neglected... :D
Are you taking lessons?
Check out my music, video, lessons & backing tracks here![br]https://www.renhimself.com