Best combat martial art?

im a skinny fourteen year old teen who has been recently bullied by bigger guys than me.mostly they team up and im not able to do anything about it (even if i complain to adults.) i was thinking about doing mcmap but i cant find a school for it. im looking for an unarmed martial art that can show me grappling sticking kicking trapping. in other words i want a martial art for fighting multiple bullies and one on one, both ground a stand up. and if its possible to have weapon disarming i would apprectiat it