it will take some time for babies to get use to new types of food, new taste, new texture etc. don't give up. just keep trying to feed it to them everyday. they'll get use to it. try starting off with rice porridge with carrots or spinach. or can try boiling the orange sweet potato, mash it and feed baby.
Expose ur child to other food, not just porridge. Rice, noodles, veggie, pancake, eggs omelette etc. I’m not sure bcos those cereals are mushy and sweet, hence ur baby develop ur preference to it
Does your baby only refuse porridge?
Ashhy