Tell me how to establish feeding. We have problems with the menu right…

Tell me how to establish feeding. We have problems with the menu right now. Soup refuses to eat for two weeks already. Carrots don't eat at all. Only broccoli if it is mashed with apple. From cans he also doesn't want to eat (broccoli, colored cabbage and so on). He eats porridge well Milupa (buckwheat, oatmeal, milk flakes. But honestly I am in a daze. How to establish the menu for us. Since the child doesn't want to eat vegetables. Meat ate in soups. I think starting to introduce small pieces might be possible. Maybe he will want to eat them himself.