Ganeshji is the lord of all the good qualities in us. So when we worship him, all the good qualities will blossom in us.
There is a saying in Sanskrit, ‘Durjanam Prathamam Vande Sujanam Tadanantaram’. Worship the bad person also. The bad people are ruining themselves so convey your gratitude to them - since at their cost, while falling in a pit and getting ruined - they are teaching you a lesson.
Install the idol, worship it with infinite love, meditate and experience Lord Ganesha from within. This is the symbolic essence of Ganesh Chaturti festival, to awaken the Ganesha tatva which is masked inside us.