Purees

I need some insight on the purées! So we had our 4 month check up last Friday and the pedi told us we could start purées anytime between now and 6 months. My son will be 20 weeks on Saturday and I would say he is definitely interested in food. He watches our every move when we eat. I know developmentally its best to wait until 6 months, so should I just wait until then? He is EBF and I know he will be primarily breast fed even when eating solids but I guess I’m wondering the pediatrician would tell me I can start anytime between now and 6 months when it’s best to wait until 6 months. I definitely shouldve asked when I was there lol but I didn’t think of it until I was home of course 🙄 I’m a FTM so all of this is new to me !