Remove the small branches for now and begin to let them grow at 36 " - 48". Would use a central leader for now. Here is a pear i grafted last year. Dont pay attention to the branches in the background.
This is the thread i grafted this pear in start to finish. Notice the dog leg in the trunk so it is easy to recognize Grafting large Callery and BET pear rootstocks in 2022 - 2023
This is the start