I have no way of knowing. It depends on you. We all watch actors spend six months being hounded by a trainer and nutritionists 12 hours a day to get jacked for movies. They work fast. Average joe's not into that, though, so I predict years of work. Maybe you're really lucky and you put on quick muscle for a white boy. Actually, here's some reading. NWS:
ChAoS & PAIN: *Dude, So and So Got SO ****ing Jacked For That Movie!
ChAoS & PAIN: Dude, So and So Got SO ****ing Jacked For That Movie: Jason Statham
ChAoS & PAIN: Dude, So and So Got SO ****ing Jacked For That Movie: Sylvester Stallone
ChAoS & PAIN: Dude, So and So Got SO ****ing Jacked For That Movie: Chris Hemsworth