You're only 18. If you feel like you can't acomplish anything now, you still have a long ways to go. If you try lots of things, chances are you're going to find something you really enjoy doing, and if you keep working to improve yourself, you're going to feel as though you have acomplished it. I've tried many things and found band and writing to be really enjoyable and I kept improving my skills little by little every practice or every time I write. One little thing can make you feel like you have achieved it. It may take some time to find it, but you will. You just have to stay strong and tell yourself that you have to keep going, even if you hit a few bumps in the road. If you're starting to feel depressed about it, talk to a friend, or a parent or anyone you trust and you know will listen to what you have to say. It's a stage that everyone goes through, to feel as though it's hopeless, but there is always hope. Most of the time, you just have to work to make that hope bigger. It'll be tough work, but it'll be well worth t in the end. Just remember that you will achieve at something, even if you don't know what it is yet. You just have to tough it out, stay strong, and keep your head held high.