What to expect in radiation treatment

Good evening,

I was diagnosed with follicular lymphoma a little over a week ago. Strangely enough, the diagnosis came by accident. Following surgery for colon cancer, and 6 months of adjuvant chemo I had the usual CT scan. It noted an enlarged lymph node in my groin. Subsequent pet scan, biopsy, and flow cytometry showed it to be follicular lymphoma (entirely unrelated to the colon cancer). It is stage one, grade one and radiation is recommended. Anyone else gone through this?  Fortunately, no sign of colon cancer.