Hopefully you were advised of the finding after blood tests and a Colonoscopy, not just after a CT SCAN.
There's more to discover.

Has the colon cancer metastasized to other organs such as the liver or lungs and are lymph nodes involved.
Being told of cancer is only part of the story and really just the beginning.

Is this where a color resection surgery would be chosen or a doctor refers to an Oncologist for chemo and/or radiation first.
Personally, a large number of colon cancer patients windup with the surgery after chemo anyway so this might require a second opinion. I'm not one to be rushed to chemo which happens. Colon cancer can be largely pain free; chemo is not.
Do your research.

Ask questions and make sure you get answers. Many have complained of doctors who offer little in explanations of things. A patient may then do something he does not fully understand and have regrets later.

It's all a process in the beginning and later a journey.
Enough can't be said for making the right decisions.
I sincerely wish you well and the best outcomes ! Paul