Inquire about having a colon resection surgery first and leave decisions concerning Oncology to later while home for recovery.
Slow things down and see how the recovery process goes before introducing the not so good side effects of chemo.
There is no reason to be in a hurry, in fact, acting in haste to begin chemo/radiation is where many find their regrets in hindsight. You can only make this decision once. The opportunity for a do-over does not exist.
Keep asking questions until you feel satisfied in the answers.
Otherwise, there are always second opinions to seek.
My best wishes.
Paul