Start with 1 time a day for 1 month and increase by 1 feed a month but continue breast feeding. If not giving breastfeeding, increase every 15 days.  Please avoid packaged food like cerelac. They are not as beneficial as home cooked fresh food. Give khichdi, mashed potato, sheera, upma, idli, fruits, mix green vegetables in dal rice.  Type baby food recipes 6months india in google and you will get many options. Websites like Tarla dalal give many recipes.