Hi Woodelf,
Obviously I'm sorry to read your news but, as 50% of people get cancer, thinking "why me" might not really be appropriate, I feel, even if it's in some way understandable.
As someone who has undergone both chemotherapy and radiotherapy, I'll try to give you some guidance relating to the last part of your question though.
The actual treatment sessions during chemotherapy are an absolute doddle. You simply sit in a nice comfy chair and have a cannula inserted into a vein somewhere, which might well be into the back of one hand. Then you just relax and, say, listen to the radio, using a device which you took with you, while an assortment of fluids get pumped into you. It's remarkably stress free. At the end of each session, you're given drugs to take home with you to take over the next few days. (Everyone's treatment plan is different. As a guide though, I had ten sessions, at three-weekly intervals, with each session lasting three hours). You might also have to self-inject (or get your partner to do it for you), into your stomach wall for the first 5 days after each session; that's actually remarkably easy, as you get pre-filled syringes that you simply plunge into your belly fat.
Whle the treatment sessions are absolutely nothing to worry about, it's the side effects afterwards that can cause problems for some people, so I'll try to indicate some of those which you might experience if you have chemo.
The one which possibly worries people the most is nausea. In the early days of chemotherapy, almost everyone who underwent it experienced extreme nausea. These days though, that's largely been brought under control and the vast majority of chemo patients either have very little nausea or none at all. (I didn't experience a single second of nausea throughout my treatment period). Unfortunately though, a small minority of people do still have quite bad nausea with chemo.
While on the subject of your digestive tract, severe constipation is a very common side effect of chemotherapy but it's easily dealt with by over-the-counter treatments from any pharmacy, such as sachets of a product called Laxido, which simply dissolve in water and drink.
One side effect of chemotherapy that affects all patients is tiredness. I found though that by simply sleeping whenever I wanted to (even if that was, say, for fifteen hours at a time), and not trying to fight my tiredness in any way, I could feel bright and breezy throughout my waking hours.
Another, almost inevitable, side effect of chemotherapy is hair loss. How that occurs though can vary greatly. My friend underwent chemo and didn't lose any hair at all during the treatment but then started to lose a little several weeks after her course had ended. In my case though, my hair was falling out within two days of my first chemo session. (Its not just the hair on one's head that's affected. I hardly needed to shave at all during my chemo treatment. So, regrettably, you might lose much of your lovely beard).
Overall though, I found chemotherapy to be nowhere near as bad as I thought it might be. So it's not really anything to be too greatly concerned about.
Moving onto radiotherapy, I had 37 sessions of it. It's simplicity itself, where you just lie still on a table for a few minutes, while the machine does its work. (Unlike, say, an MRI scan, the machine isn't noisy. It just makes a whirring sound as it rotates around your body).
Other than yet more tiredness, I had no side effects at all from the treatment except for those which wouldn't be relevant in your case anyway. (I was having pelvic radiotherapy, where the beam affected both my bladder and my bowel but, obviously, that won't be a concern for you).
I think that's enough rambling from me but I'll provide you with a link to the Macmillan website, where you can find loads of reliable information:
https://www.macmillan.org.uk/
All the best to you mate,
Chris