Time it takes to become a FP DO

Hi everyone! I'm trying to make sense of the process that follows after being accepted into a DO program to become a FP DO:

2 years - basic sciences in med school
2 years - clinical clerkships (still part of med school)
Take the USMLE/COMLEX (USMLE is preferred by most? And when you apply for DO/MD slots once you get a DO slot your app is withdrawn from MD pools?)
2-3 years - low pay residency
1 year - AOA approved internship to be able to be certified in states like PA, FL, and 3 others (is the internship paid??)

I know I'm probably missing some huge necessary milestones so if anyone can offer corrections on the timing it would be a great help. Thank you!