This time that you're going through is probably one of the hardest. Getting that diagnosis just sends you reeling. As @zoffiel says, you sound like you're a strong woman who knows how to get organised but you were dealing with so much even before this news landed on you and it's hard news to cope with. It should start to get better once you are on the treatment train.
However you choose to manage this time is okay - you can curl into a ball and shut out the world as much as possible, or you can tell everyone you know what's going on. When it was my time, I chose a middle ground - I told very few people but they included a couple of really close friends who then told the rest of the friendship groups with strict instructions that I didn't want people contacting me.
It's hard to be alone when you're needing a shoulder to lean on and I guess that you're missing your husband's presence there. Please remember that you are important too.
With regard to the farm, find out from your surgeon exactly what you will be able to do as treatment commences.