I can relate to Alice in Wonderland. She just keeps randomly eating and drinking everything she sees with the hope that it might magically solve all her problems.
Ask yourself this when someone says you can't do it. What's holding you back? Exactly. Nothing but them and you, but only because you are letting them.
Dear Self. You know what they say about perfectionism...don't you? Why you don't have to be perfect, and in fact it's necessary that you don't try to be.