I would learn some small stuff first. Aikido, judo, krav maga. Brazilian jujitsu is a waste of time for more than one attacker. Aikido is excellent for weaker people. Same with judo. Krav is more of a brawling art. Steven seagel is a joke when it comes to acting but watch his movies, the aikido is very real. Good luck in your journey to the martial arts.
You believe that there is one God. Good! Even the demons believe—and shudder. James 2:19
"I do not fear the man that practices ten thousand kicks one time, I fear the man that practices one kick ten thousand times." Bruce Lee