BOXER’S FRACTURE

I broke my fifth metacarpal (right hand) 4 days ago.
I’m wearing a cast and the doctor taped the pinkie and the ring fingers together (fuctional taping).
How long will it take for it to heal and the cast to be removed, considering that I eat in a very healthy way (including 3 portions of dairy products per day)?
What can I do to accelerate the healing process?
I’m a martial artist and need to go back to my regular training. Any advice?
It will be highly appreciated.
Thank you!!!