I have looked at your photos and honestly, I don't think your fondant looks at all bad. But if it is not stretchy, then that would suggest you are not kneading it for long enough, or you have too much dry ingredient in it.
Some of our members here have posted fondant recipes that you might want to try - here is the links to them
Maybe too much icing sugar. Some decorators said, put shortening on your hands when kneading fondant and mix with a little tylose powder to make it stretchy. If you don't have premade fondant, just make marshmallow fondant. Check google for more recipes.