How do i use Guerrilha warfare in a world map?

How do i expand fast using this strategy in a world 50k?

I wouldn't use it in 50k maps. It's meant to be a low cost strategy whose expansion is slow (transports are more expensive and have nerfed range) and its lategame is really strong. For that amount of money better use other more expensive strategies. In case you feel like playing marines, use MoS.