Confidence. Self belief. Vision. Drive.
These characteristics are so necessary and so easy to personify once you make a start. By thinking you can't make it work or that you're not enough, you're only hindering your potential, you're self-sabotaging and speaking as a former consistent self-saboteur, I know how the negative thought pattern can build and seep into every aspect of your life. Once you let it in, it's everywhere, you become defeatist and it becomes so easy to just give up.
Start small, start with just being grateful for what you have, be grateful for the small things that make you happy, recognise your greatness (even if it's something small and seemingly insignificant) and be grateful for it - trust me when I say that when you begin to recognise your greatness in small measures, it builds, and it builds far stronger than the negatives do.
You are a powerhouse, you are damned amazing and you are capable of a myriad of astounding feats, if you'll only allow yourself to see it. Stop standing in your own way and instead start paving it.