Wanting to back out- afraid I won’t be able to deliver

I agreed to do a presentation for an organization and can’t think of what to put together. I need to submit my today. I have no idea what to share with these women that will be valuable and inspiring. I know my thinking is keeping me stuck. I’m tempted to back out but I feel bad doing so and also know it’s my fear, self-judgement and overwhelm at play and see this as a growth opportunity but am stuck : (