Don't count on too much time, farming takes all your life, and if it doesn't you aren't doing it right.
Many years, man boy and donkey (mainly donkey), I would not have not done it for the world.
You have only to say what you have done for it to be the most fascinating blog. Your experiences will be outside what so many do. I hope you have the greatest experience of your life, but why wouldn't you?
I think you will have to get there and find out what time you have and what sort of place you are in.
As to the practicalities, I think if you search for things like "Blogger" and so on, you will find that it can be quite easy. Just don't think that the first few weeks working will be a good time to find out!
I blooming envy you, work as hard as you think you can't and go for every opportunity.