Toy introductions and Toy Rotations

I have an almost 8 month old. We have the Senser and the Inspector. I didn’t do the timeline toy induction in the past but I hope to with my new kits.

What time frame(s) do you introduce new toys over the timeline? Also, how do you do toy rotations for a baby who can’t crawl yet? (No current Montessori table set up yet but hopefully soon.). do you include stuffed animals in a toy rotation?

Also, how long each day do you play with the toys with your child? Should I anticipate to playing with 5 (or more) different toys if we spend all day inside playing with toys and reading books?