Baby solid food

Hi .. my lo currently gg 9 months. As i am a working mum and ifc quite a distance from home. I will always nd to fetch my son after work. But whenever he reached home , he will be very hungry. But i have got no time to prepare solid food or porridge for him. I gave him nestle cerelac rice with some pureened carrot most of the time. My concerns is is it safe to have instant rice everyday compared to cooking porridge ?? I am worried about my son health. Any mummies can help ?? Thanks