They don't need to have commandments of God....... Because they don't believe in single god. They dieties. They believe in something called "naam" which is recieting a prayar or a name over and over.
Well actually your wrong hereonly the primitive forms of Hinduism is actually Polytheistic which probably descended from the old Nature worship but since then it has evolved to various schools of thought ...... the mainstream Hinduism may appear polytheistic while the other schools of thought can be be anything from pantheistic to monotheistic to agonistic to atheistic to outright materialistic, but in most cases the deities you have mentioned are actually considered to be personified representation of the Supreme one (Param Brahma). Also our prayer system is not very simple either.... most people would find our chants and rituals funny but they carry a deep spiritual meaning... Let me give an example: When we offer flowers, fruits, incense and various sort of lamps and the priest starts chanting in some or if not most cases (I am a Bengali so I can only talk about my people) they are basically (in Sanskrit) thanking the God for providing this beautiful world by offering him the best of our world (The flowers and fruits represents beauty and prosperity, the incense represents the stars, the lamps the sun and the moon and other celestial etc and the like) ..... Also there is another prayer event that takes place Mahalaya done prior to the Durga Puja Festival (This festival signifies victory of good over evil.... and also the Female power) there the chant basicaly translates to "Oh the Great Goddess who is omnipotent we pray to you as the Representation of Strength, Oh the Great Goddess who is omnipotent we pray to you as the Representation of Piety .......... (its really long)" etc ... But yes we do have a tradition of chanting names but those names also represent the various aspects of that Divine Representation and we are just honoring and paying our respect by mentioning them ........ So as I was saying you can not generalize Hinduism in any way bcos of the vast magnitude of tradition that vary even from family to family.
Also another fun fact about the Hindu deities (well the story was passed down to me, but as I said its our variation of the story) ...... we were told that there are estimated 3.3 billion deities, and you know why? Because our elders once thought there are about 3.3 billions people on Earth, and in each person a part of God resides.
The vedas were actual books, compiled by the Aryans.
Yep they are actual books, but neither the Book of Hindus or Aryans not the whole Veda is contained in those books .... Veda represents the infinite pool of knowledge and those those books compiled by our ancestors were just humble attempts at gathering what we knew at that time. Its a bit like the Lexicon, it has all the words and its meaning cataloged in it but yet new words are discovered/created and the list of words grows, the Vedas are the same ..... its not the book of our religion (Heck the Veda does not even mention the word Hindu or even religion) but its the collective Human knowledge.
*Sigh* Our philosophies were not that simple and it was our attempts at simplifying the complex, limiting the infinite and shaping the shapeless that drove us to our ruin.
And about the "personal" its the same every other religion. Just look at christianity... people go to church some don't...
Hmm legit ....... but still Hindu culture allows much more flexibility than any other.