At first, do a jar every few days. Our pedi said it was okay to do a jar a day to start out but when introducing new foods, you need to wait a few days between each to make sure that if they have a reaction, you know what it's from. My daughter is 6 months and she eats one jar a day, we alternate between breakfast and lunch. Make sure he's showing interest in foods first!

Well my son is already eating solids, I just don't know for sure if I'm feeding the right amount

I usually try around lunch time. they will show interest or not. my 5 month old tries to drink from my cup and reaches out for my food and opens his mouth when I take a bite of my food. he's def ready for solids but I won't start until next month.

both my sons ate one jar a day until their bellies got used to digesting the solids.

do be careful tho, he will get constipated.