The religions (they are a family of related religions) that we in the west call ‘hinduism’ is called, by followers, “Sanatana Dharma” or “The Eternal Way”. Internally, Hindus teach themselves that their path is eternal, never ‘created’ but rather just discovered by various seers over the ages.
Historically, classical Hinduism derives from the religions called “Vedic”. The Vedas are the four most holy books of Hinduism (there are dozens if not hundreds of others) and they are largely concerned with ritual action and mystical attainment. Vedic religion had a certain resemblance to Old Testament Judean religion, based in sacrifices to the Gods and the receiving of their blessings. The Vedas contain very ancient material (written versions start at c.1500 bce, latest, and those reflect an oral tradition much older.) and have no known author, though there are some legendary names associated with them. They are considered ‘revealed’ scripture, given to mortals by the gods, and are still revered in modern Hinduism, though they are archaic and mostly unused.
Hinduism as we recognize it arose after 500 bce. Hinduism reformed vedic religion to be more concerned with personal spiritual experience, less concerned about proper ritual action, and more concerned with ethical behavior. Classical Hinduism, Buddhism and Jainism all derive from this phase. The Gods named in the Vedas (such as Indra, Mitra, Varuna) were mainly set aside in favor of the gods we know in modern Hinduism - Vishnu and Shiva and the Goddess. The scriptures of classical Hinduism are the Upanishads, and these have no remembered authors.
There are several popular ‘sects’ of Hinduism, some of which do have historical founders. Shankara (c.800s ce) is a founder of the Advaita Vedanta philosophy, and also of the Smarta system. Individual Hindus are usually initiates of a specific school or system, and these are likely to have more recent founders.
Nevertheless, Hindus don’t look for a teacher who was the first teacher, assuming that their ways have been the holy ways from the foundation of all things.