Hello and welcome back!
So he is now 6 months and as you say should have 4 solid meals. If you breastfeed we usually suggest you do it straight after the food as a top off. If you give the bottle you can if you wish to do the same. The whole solids with after chasing the bottle all within 30-40 min.
Don't forget to re-read the book 2-3 times before doing the cure and if you wish we can support you with a good schedule and more, just let us know.