Can I be a Boxer or MMA fighter at the age of 25?

You have a lot of work to do. This is like a steady full time job. You have to train consistently 5 days a week. This includes roadwork-running, Going to the gym exercising.This is much different than street fighting. The Average Joe on the street does not know how to fight. The Average Boxer in the gym does. The veterans will teach you the most but they may hurt you in the process consider it a welcome aboard. I have known guys that said i do not mind getting punched in the face however do you mind getting punched in the face 50 times that is the question. Getting in the ring and actually fighting separates the men from the boys. I wish you well. I used to with a friend train 2 guys who were golden glove champs and we determined this is what it takes to be a success. Talent, Determination and Training.