I'll answer briefly, I’ve not much time :p In my early childhood age, my parents taught me basic morals. And when after entering school, teachers learned us more about things we may face in our daily lives. And after I learnt reading -in primary school days- I started to read about this in religions books. And when I grew up, I started to ask more people & read different books. But, the best teacher was life. I like this proverb: “ life is hard teacher, it gives the test, the lesson afterward " ;-)

We filter everything through the eyes of our experience. The idea we have of the life is the sum of direct or indirect events we were protagonist or audience of. Sure: family, state, religion, sex, culture, friends, influence and steer our way of thinking and behavoring. The day by day life make the difference. The streets we have choiced at the forks of our lives, lead us to be what we are and what we think of life, morals, and and and...

Above all things ot parents, very large part in life is acted by education. Well and certainly religion, and also special literature

You " learned the morals of life " from you parents & some other from your religion & some other you learned by your self & some thing from your friends ..every thing a little ..so ,good luck in your life :)

Your parents, religion and your school teach you about morals.