Begin by selecting a clean and well-ventilated space for your pooja room at home. Then, using a decorative cloth or a wooden cabinet, construct a small altar or mandir. Decorate the space with flowers, candles, or incense and a statue or picture of your chosen deity. To make a more intricate display, add small decorative items such as bells or statues of other deities. Finally, consider adding lighting to the pooja room, such as string lights or lamps, to create a calming and peaceful atmosphere.