If you decide to leave the hubbub of the city for farming, remember that farming involves tasks that aren't part of the responsibilities of city jobs. Here are some ways to lessen the learning curve if you decide to take up hobby farming:
Do some research so you can make a more informed decision. Besides all the pencil-to-the-paper research, like on the Internet, you can do some feet-to-the-pavement research — get out on the streets and go to the local businesses, the local library, the local county building, and so on.
Do volunteer work. Maybe help on a local farm — milk cows, clean animal stalls, help with the weeding or picking. Not only does this give you some good experience (and let you test the waters), but it also gives you the fun experience of being involved.
Hang out on a farm and watch what goes on.
Start your operation small and leave room for expansion.
Build off skills you already have.
Keep detailed records to facilitate trial and error (so you know what worked and what didn't).