Erection and Delayed Ejaculation issues

Greetings all, this is my first post on Mojo. I am an aware 56 year old lover, enjoy foreplay and sensual engagement, and am very sexually inclined. I am overweight currently, have been for years, and am working on resolving that. While not exactly clear on the timeline, my sexual performance that had been typified by full hard erections and being able to cum with partners as well as when
Masturbating, shifted in my fourties to become less hard and big, and less dependable and fulfilling. At some point maybe even before that, I only was able to cum
Masturbating standing up, typically in the bathroom for easy clean up.

At this point, my erections are only temporarily hard, but get softer and fail. I cum sometimes, not always. With partners, for years now, I have not cum at all. I really enjoy making women cum and that gets me temporarily hard, but that on lasts for a short while. I can have sex penetration for short bursts to a while occasionally, but I never cum. I am in a new relationship, and the lack of a long lasting hard erection does limit my ability to please her, and frustrates us both as she wants me to cum too. I know my weight and being out of shape hurts, tested my testosterone which is low at 127, and have just started trying ED meds with only limited success at best. Will
Be looking into TRT, meds, exercises, devices, treatments, and sexual psychology therapy as needed to get my “mojo” back. I welcome constructive feedback. Ty.