No, the brush is useless. It just softens the airflow. Check for Giotto Rocket Blower (available in many shops).
In general: don't get carried away with excessive cleaning. A wipe for the sweat is enough. Hunting dust is futile, focus on the dust that will appear at the sensor sooner or later. Only there it affects the image. Dust on lens can be neglected, unless it forms colonies.
Google a bit, search the forum, plenty of information.
depends on you whether you want to keep it in a dry cabinet or not.
as for me, i will use the blower to blow the dust from the equipment i used during that day
then i will wipe it using the cleaning cloth then it will be stored in my dry cabinet until next use ~