www.wholesomebabyfood.com has been very helpful to me in knowing at what ages I can give ds which foods.
Something that I've found challenging in the BLS approach is the practicality in offering from my plate but doing the four-day wait rule simultaneously. I don't typically eat the same foods four days in a row or even have part of my meal the same for that time period. So, once ds has had the food I have on my plate, passed it without reaction, and I happen to be eating it, I'll offer. That's what it means for us by taking what works for us and leaving the rest. Different strokes for different folks, ya know?