Need cat advice

I recently got a kitten which is old enough to no longer have milk. He’s a Chartreux breed and I mostly wanna know how much I’m supposed to to be feeding him and how many times a day?,

There are some things I’m worried about though where one of his eyes became dilated and the other didn’t so I searched it up and it said I should take him to a vet immediately because that shows a lot of symptoms of bad illnesses. It’s only happened about once and maybe twice today.