The recommendation is to not add cereal to milk feeds, and to give them separately. You can give 2 little feeds of solids each day, not a problem:) a few teaspoons each time is fine. You can keep increasing as tolerated, and also introduce new foods every 3 days, looking out for allergies
https://sg.theasianparent.com/tips-easy-recipes-weaning-feeding-fussy-infant