When to start weaning onto cows milk and how to do it?

My LO is 11 months at the end of the month but I've already started to introduce cows milk ... It hasn't replaced his formula but I give him 3/4oz with his lunch or dinner just to start introducing it

@Nicole oh okay thank you, maybe Il start introducing it now then 😊 do you warm it up or give it cold from the fridge?

Cold from the fridge ... He absolutely loves it

@Nicole thank you. Il try today

I started introducing cows milk since about a week before she was 11 months old. Max she’ll have a day is 6oz but she is breastfed and solids