Insecure and just can't focus

I know that with OCD can come other things like depression and ADHD, etc. I know do experience depression but I have also been wondering if I experience ADHD too. It is so hard for me to focus on a task. I get so many ideas of things I want to do and I get excited about it and then I never start or I barely give it a chance and I give up. I have been like this my whole life. The only thing I feel I am semi-good at is being a mom. I am passionate about my children as most mothers are. When it comes to anything else than it just doesn't happen. I have had dreams about making candles and I actually did make them but after the kit was used then that was it. I make excuses for everything and it makes me mad. I have had dreams about selling things on ebay and making money, making other things and selling them and making money. Dreams of having  a nice garden, but something always gets in the way. I went shopping for some clothes this weekend and I always seem to come home empty handed. I can't find anything that looks good on me or it's too expensive. Then after thinking about doing these things and then finding reasons why I can't do them I get really tired and just want to crawl into a little ball and hide. I did something out of the ordinary and I signed up to take a class at the community college. It starts next week. It is just an online class but I had to take several steps to get there. I don't even trust myself at following through on things. That's not cool. I was going to post some things on ebay today and when I got home I noticed all the clothes are wrinkled and it's just going to be so much work and I probably won't even sell anything. I hate being so hard on myself and feeling like I'm not worthy of having success. I just don't know how to get over this mind set. I want to be successful and I belive I am worth it but I just don't know how to do it.