Yes! Yes!!! And as you say, you are in a great physical shape (and I do not mean to qualify it with "great physical shape for a 57 year old man", but just great in general, globally, without a qualification), with a lot of successes under your belt, with an unusual openness to therapy and self-improvement, with a poetic talent, with the sex drive higher than it has ever been and the ability to make a woman climax (assuming this ability is generalizable from your current wife and former sexual partner): that is PLENTY to carry proudly into your next relationships(s).

I just want to suggest one thing regarding your hyper focus on your wife's climax (in the past). For your future women, making their climax more important than yours is OK as long as you do so because you are keenly empathetic and you experience their pleasure as your own, because you are happy for them and maybe a little proud of your efforts. It is not advisable to prioritize her climax because it is a testament to how good of a JOB you have done, which is what you wrote. In general, the less you equate sex with achievements/performance, the better. This is especially true for you personally since you write poetry and want to make poetry part of the intimate encounter. Forget about doing a job, any job, and enjoy.

57 is nothing by today's standards. But given how much you work, it is important to also find time to exercise, and of course you should eat healthy foods. If you do that and add to that your (future, and I am sure you will get there) emotional and physical intimacy, and if you also stay on top of your health, take care of issues, and stay connected with your elder parents, your children, your current's wife's children, your friends and the larger community, you have a very good chance of living a long life. Take advantage of it, learn from the past but do not dwell on it, and look forward to your next adventure and what else is awaiting you on that journey. It is already the fact that his marriage is better than prior marriages and there is nothing to preclude you from enjoying your next relationship even more.