Which whole milk am I supposed to get?

So first time mom. My 14 month old is still on formula, so im feeling like hes slowly ready for whole milk. Is it bad hes still on formula? He was having constipation issues til now

Anyways. Which “whole milk” am I supposed to get? I keep hearing to get “whole milk, cow milk, 3.25% milk”…. Which one!?? Lol. Is it a baby type of milk in the dairy section, or just milk for everyone..?

I probably sound stupid, but can someone link a photo please?😅😅😅

Hes eating food mostly, so how much of this milk a day even?

Im in Canada btw. Our milkss might. Be different?

Is this it?