Ganesha idol should always be kept in the east or west direction of the home is important. You can confirm placing it in the northeast direction of the home. Avoid negative space like washroom, toilets, walls adjoining one. Similarly, it is best to opt for the pooja room, offices, study tables, home entrance, etc. for placing the same. You can also select the rituals of getting the clay Ganesha to attain the best results. It is best to worship the same in morning and evening.
The entire home needs to be cleaned before bringing the idol to your home. Ensure that the whole family is gathered in the evening to recite prayers. The same should also include durva, flowers, karanji, modals, etc.