Baby Food

My LO will be 15 weeks on Wednesday - Lately formula does not seem to cut it. She'll drink 4 oz regularly during the day - before bed shes taking 6-8 oz and will wake up multiple times in the night to eat. Even when I feed her 8 oz - She still seems hungry.

I was thinking about trying some cereal with a spoon and bowl (not in her bottle). I also picked up some stage one apples and bananas I was thinking about trying.

Is it to early? She sits straight up pretty well, holds herself up on her tummy etc.

Has anyone started foods a little early?