How often do you feed you child at 6 Months?

This past week I have had so much thrown at me about my boys (in a good way!) but I’m kinda confused.

Having a young doctor, he told me I can’t even give them juice and no water, which even I questioned but being a first time & young mother I took what he said. (I still give my boys a little water.)

Anyways, they already eat 8 ounces about every 3-4 hours. So as of right now, I give them 8 ounces for breakfast, either a jar or pouch (I like both, but since it’s veggies usually jar) of veggies along with 6 ounces of formula, and in between then and dinner just regular 8 ounces, but dinner time it’s usually fruit and oatmeal cereal but I’m thinking about doing just fruit now that they’re used to eating food - (along with 6 oz).

Can I give them more food? Or am I doing just fine with what I have? Any tips or suggestions are useful and I will not tolerate any disrespectful comments. Thanks!