Combato looks to be some form of Fairbairn/Applegate , probably decent stuff although martial artists like Robert W. Smith are not keen on Fairbairn and Applegate.

My advice is to get into some kind of mixed martial arts, Brazilian jiu-jitsu/wrestling/judo and add to it Muay Thai or regular boxing.

My view is the important thing is to get into unrehearsed matches whether that is in the ring or on the mats where your opponent is going out at full strength.

Just realize that in a real confrontation with your adrenaline pumping it will be a different story.