My bb is 6 months old now. Should I feed him with porridge or rice cereal? Thank you!

I'm mixing BLW with spoon feeding . When I attended a weaning workshop by Mdm wbb she actually mentioned that porridge should be fed later at ard 9 Mths. For eg. I will half my portion.. Half for BLW n half for puree.. N I always mixed the puree into the plain cereal to make it more nutritious n tasty :)