Not interested in food?

Hi all. My LO is 8MO. I've been feeding him Gerber cereal (started of with just oatmeal or rice with some purees and introduced the flavoured ones when he was 7MO) since he was 6MO. I can't cook or make his food from scratch as im living with my in laws and it's a hassle because of the condition of the kitchen and space constraint therefore i sought to feeding him Gerber cereals.. tried introducing Cerelac but he had an allergic reaction. Is it okay to just feed him these instant organic cereals instead of making food from scratch with fresh produce? I'm waiting for my own flat, in about 2 months time. And will start making my own food then. I understand babies main source of nutrients still comes from breastmilk. So im just wondering if its okay to just feed cereals..