Help, when and what can I start feeding my baby?

Patty • 👩🏻👨🏽Married Mom of a 25 daughter, 23 son, 18 daughter, 13 son, and new bundle of Joy 9 months!! 👯👬👼🏻💖💙💝💙💙
👶🏻My baby is finally 4 months and my Doctor said I may start feeding him at  4-6 months but wasn't clear.... I'm confused😬...I noticed my baby looks at us eating and looks at our food!!! I feel bad because I'm not feeding him...Can I start giving him fresh fruits and veggies 🍌🍲besides cereal???  What are other mommies doing???