Survivorship/Care after treatment

First of all: I complete treatment next Friday!! WooHOOOOO
My question now is, "What's next?"

I've asked my radiology team, the breast cancer center, and the Cancer Center. No one seems to have a clear line of action or direction.

I'd really like to know what I need to do, step by step, to give myself the best chances of not having this reoccur (I've already had one reoccurrence and don't want to go through this three times).

For my first diagnosis, I chose to have a double mastectomy and no additional treatment as it was very early and great margins.

This time, I want to do Every. Possible. Thing. I can - I had surgery, chemo, and am now completing proton therapy.

As you know, this is a whirlwind experience, a whole year of focus on health and managing life with cancer. But it seems like this journey just "ends" for me next Friday.

There has to be more, doesn't there? Like, what are my follow up visits? What kind of scans do I need to continue with for the next 1, 2, 5 years? What about bone density issues (I have osteopenia). And, most importantly, am I DOING EVERYTHING POSSIBLE TO LIVE MY BEST LIFE?? What about my life going forward? Nutrition, exercise, vitamins, supplements, personal care... ??

Does anyone else have these questions or feel like it's a hard stop at the end of treatment like I do?

Thank you for any suggestions, advice and/or support!!!
Joy