This actually sounds more like enneagram 9 problems than EII ones. The most common tips for 9s are: Try to work on your self-esteem, until you can sense that your contribution to the world is wanted and appreciated. Maybe make a list of things you wish for yourself, things you're worthy of. Achieve them.
Se skills that could help you are : learn to say no when you don't want something, try to be more present and engaged with the world, get to know your physical strength because you have more than you imagine