Hi James,
You have a great attitude and that is half the battle. If you read my signature you will see my husband was similar in age and dx to you. It is a rough journey, but you'll get through it.
You will lose weight so really bulk up as much as you can the first couple weeks. Remember that hydration and nutrition are of utmost importance while in tx. You won't want to eat or drink, but you have to make yourself. Scrambled eggs are great because of the protein. If you make them runnyish they slide down better!
There will be lots of others coming along with much more detailed advice. Just know we are here and that you can pm any of us if you want to. As you go along remember tx doesn't end for about 6-8 weeks after your last radiation tx. We were a little blind sided by that. This site got us through it though!!
So glad to hear you have a lot of support.
Kathy