How to feed a 1 year old ?

How do I know what’s safe to feed her ,

Or how much to feed her? Like today I fed her rice she has eaten that before I fed her strawberries she’s eaten that before as well she ate pozole for the first time not a lot but I gave her the hominy an anyways fast forward to the night she starts throwing up chunks everywhere of all the food from today. I was already nervous to switch her from formula to whole milk cause she gets very very constipated an I really don’t know what the hell im doing I’m just worried that I’m doing this all wrong I felt so bad I ran to the store at midnight an got her medicine her little face was green an she was just having the worst time my poor baby. So is there a schedule I should stick to I know she has a tiny tummy I just don’t want her getting sick again someone help shesmy first baby.