Even if you have stretch marks or acne scars, don't let that ever discourage you from working on yourself!
We have to learn how to live with certain mistakes from the past. History should build the future, not hamper it! I've got a deal or two of horrible acne scars and stretch marks, though the latter isn't from being fat, but that didn't stop me from trying to improve my health, eating habbits and physical activity. It did make it harder but in the end, it's always worth it~
I hope you will have a nice day and find energy and will in yourself to fall in love with healthy livestyle!