Hello moms! Tell me how you weaned your child from a bottle and night …

Hello moms! Tell me how you weaned your child from a bottle and night feedings (I know that they need water but it doesn't help, the child has drunk a little and is walking around, maybe an hour of walking, but I can't immediately feed him and he falls asleep). And one more question: at what age should you start potty training a child (1 year old, he stands firm on his feet, I put him in clothes on the potty and show him that he can sit on it, he immediately cries and gets up)? Thank you for the answer!!;)