I started at 4 months with all 4 of mine. None of them are overweight.
No rice cereal… 6 months u can use oatmeal
Wait until 6 months and All signs of readiness as it can mess up his digestive system and he may suffer Futher down the line xx
Wait as long as you can as otherwise most goes straight through! Mine had millet porridge from about four months. They start grabbing food off your plate when they’re ready for more than milk. I didn’t bother with purees either, just lumpy stuff.