You can incorporate it into just about any meal as a side or as a bed for stir-fries, chili, omelettes. Toss leftover rice into soups and stews. And it s good for you. One light rinse is sufficient despite the instructions for multiple scrub-bings you might find elsewhere. If you find many rotten black grains or rocks, try a different brand next time.
Green grains are normal.
A low boil works much better than a slow simmer. Never stir during cooking. The delicate network of steam tunnels formed by the boiling water is the key to fluffy rice. Stir, and the end product is sodden. Turn off heat according to the tilt test.