You will never be ready. Just go do it anyway.
We can spend our lives preparing to live. There is no story in that. Instead, our life stories should be about accomplishing or failing, with one outcome preferable but either outcome acceptable.
Instead of asking if we are ready to do something, let’s simply ask why we are doing it and then let the process go from there. The rest is just ambition and ego.
Tomorrow I will attempt a marathon, the longest distance I have run since my ordeal began 34 months ago. Because of my challenges, I will never feel ready. OK, so if I fail, it will be a beautiful epic failure. If I succeed, I can close this painful chapter of my life, having reached my self-established minimum level of “recovery”. It also means I am well enough to finally tackle ever larger adventures, such as the Rota Vicentina in Portugal next month, and onward from there....
I can feel relaxed about all of this because I know why I am doing it. I am doing it for myself, for the indescribable joy of running as the essence of humanness. I am doing it for those who can’t, and for those who think they can’t. I am doing it because I love dirt and hate pavement. I am running this silly thing in the name of love, truth, grace, and beauty, which is the reason why I do nearly anything in my spartan and highly distilled life.
Answer your why, and then just go.