At the basic level:
(1) Belief in Sanatan Dharm (eternal laws of morality). These don’t change with time and are as true as math. Know and do your duty in every role or have the moral obligation for.
(2) Belief in Pluralism
you can believe in one god/goddess, many or none. your approach for spirituality is a personal choice that is respected and not ridiculed and oppressed.
(3) Belief in Karm
everything we do/don‘t per Dharm has a consequence that the actor is accountable for. Your karm determines your character, defines and makes/breaks you
(4) Belief in Kama (wealth & pleasure)
the human form is privileged so dont waste it. Work in a noble way (per Dharm and Karm) and partake unapologetically in the creation and perpetuation of wealth (knowledge/money/fame etc) and its benefits.
(5) Seek Moksha (liberation from worldly suffering and attain enlightenmemt)
Unlike abrahamic faiths that guilt you as damned/sinners whose souls need to be saved, Hinduism considers divinity in every being (Namaste) from the get-go. The suffering/anxiety related to living can be removed by striving for Moksh and there are many ways prescribed.