Hinduism started in 1500 BCE in India. It has 333 million aspects of Brahman, and there are gods, and goddesses, like Vishnu, Shiva, and Brahman, who are worshipped more than the other gods. Some other gods and goddesses are Devi, Shakti, Ganesha, Krishna, Kali, Saraswati, and many more. We, Hindus, believe in Reincarnation, which is a cycle of birth, death, and rebirth. We believe that the soul does not die, but enters the body of another being. A person's karma (bad or good actions) determines their wealth, position, and social class in their next life.
Buddhism started in 500 BCE in India. It was founded by Siddhartha Guatama. Guatama was an Indian Prince who had riches and luxury. But when he saw the distress the people had, he decided to become a monk and traveled India for years, hoping he would find out why people suffered. After meditating about the suffering, he finally understood what had to be done. He felt that people can find peace if they reject desire and greed. He became the Buddha, or also known as "Enlightened one." We, Buddhists, believe in the four noble truths, dharma, eightfold path, and reincarnation. We do not believe in a god nor gods. The goal of Buddhism is to find Nirvana, which is peace and happiness.
Shintoism started in Japan. It is based on traditional Japanese teaching that everything in nature contains Kami. Kami are spirits that can take forms of things such as wind, rain, mountains, trees, rivers, and many other things. Shrines are built to worship ancestors that become Kami after death. Shintoism also teaches purity, physical and moral. We, Shintoists, preform many ceremonies and rituals to connect us to nature. We do not worship a god nor gods. We are expected to respect and honor all nature and life.