I’m scared

I have always been heavy. Like always. Working out has never really stuck, I seem to give up after like a week. I’m at my wits end with myself. I need to be better about working out and I need to stop doubting myself but I’m honestly, truly frightened. I have never known a life other than being obese. What if it’s worse? I’m not talking like health wise because I know it is healthier, I’m talking like self confidence. What happens if I stick to this new workout plan, lose the weight and still don’t feel comfortable in my own skin? What do I do then? Has anyone else felt this way?