6 months
6 months or when they are showing all physical signs of readiness. Check out this reel from SolidStarts on Instagram for what physical readiness looks like: https://www.instagram.com/share/reel/BArtuE5xYC Also, skip the rice cereal as it's nutritionally useless. Iron fortified oatmeal is better. It doesn't have to be baby oatmeal, you can just grind up regular, adult oatmeal
Older generations gave cereal before 6 months but it’s not recommended anymore. Unless baby has reflux problems.
6 months