Namaste,
I think there are plenty of good suggestions already, so i will only advise what I think is considered the key features and requirements of Hindu Dharmah.
Dharmah - Responsibilities, Natural disposition, righteousness, Duty, vertue, Ethics, religion, spirituality are some words to describe Dharmah, but Dharmah is a "Non Translatable", word. Dharmah is a context based idea, each individual has their own Dharmah (SvaDharmah), but also as we are living in communities and in specific societies each community/society has its Dharmah that can be different from another set of communities ect.
As Hindus Our Highest and Prime Dharmah are advised as, Satya and Ahimsa.
Satya being generally described as "Truth", it is also applicable to being honest in ones words and deeds, for Hindus the knowledge of Truth is paramount and is the first and foremost Dharmah. Ahimsa is a deep concept with requires that the we as Humans must limit or minimize the harm we cause to our self and others and also the environment, it is the principal of not being the cause of excessive or unnecessary harm, but Ahimsa has never meant that we become passive to violence or are not to defend our self by the means of force, in Hindu Dharmah, Ahmisa also requires one to actively be against the causes of Hinsa (Harm).
The Concept of Karma is also a key Hindu belief, Karma is action performed weather intentionally or unintentionally, for Hindus even breathing is Karma, with Karma (action) there comes the Phala (consequence) and in Hindu Dharmah the idea is that since we are not in control of the Phalla of Karma our Karma must always be intentional or one must always be conscious of our actions as the consequences may effect us self and others also.
The other common and key concept that i can think of and which probably relates to your search is our concept of the "Atma", or the Self.
In Hindu Dharmah generally many would agree that the Atman is un-created, no Deva/Devi/Avatar/Bhagvan/Ishvar/Brahman has "Made", or "created", the Atma, and is therefore eternal. The Atman is also recognized as being Sat-Chit-Annand, or Truth, Consciousness and Bliss and therefore our innate nature is that of "Goodness", Purity, Truthfulness, Blissfulness and any actions, thoughts or words that we do if they are against the concept and our innate nature are discouraged.
We are told simply to "be good, do good, for the sake of Goodness", because that is our natural disposition.
The Atman is to be realized rather then believed in, and there are many methods (Bhakti/Karma/Gyan Yog) to help us and guide us to fully comprehend our True (satya) existence.
Hope this helps,
Dhanyavad
