I was diagnosed one year ago with stage 2b ER+/HER- breast cancer w/2 lymph nodes positive ("micrometastases"). Even though I was early stage and had clear margins, due to my lymph nodes and large tumor size I am considered "high risk" - so in a different situation than you.

I won't give you treatment advice, but will say that my decisions for treatment have been data-driven, listening to the experts (radiation oncologist/medical oncologist/surgeon), doing my own research (looking at legitimate medical journals) and asking the experts lots & lots of clarifying questions so I fully understand what my body is doing and the benefits and risks for each treatment. Whatever your decision regarding treatment, just be sure you feel good about it going forward.
(fyi - I did 5 weeks of radiation - other than terrible skin burning/peeling at the end which healed, it was fine; I'm taking anastrozole for 7 years and have been on it for 6 months. Hot flashes and sore knees stink, but it's important for my situation to stay on it. I've found acupunture to work wonders. The worst part of my treatment is taking the medication Verzenio, a protein inhibitor because I'm high risk, which it sounds like you won't need -thank goodness. )

Best of luck to you!