so your farmer...what skills do you get up on it? That sounds very like me actually as i wouldn't want to do the main quests, this has interested me a lot!
I started the game in a farm I own thanks to a mod, then I discovered an iron ore near home and needed a pickaxe. So I traveled to Solitude with no weapons and gear at all and ran away from any bad encounters along the road. On the way back home I stumbled upon some wolves and defended myself with the pickaxe, there, One Handed leveling up. Since I have to go back and forth from home to Solitude to sell my cabbages and buy some meat, I thought I needed some decent gear, so I bought iron armor from the blacksmith, again did some bad encounter et voilà, Heavy Armor and Block leveling up. Since I am a farmer I'm supposed to know what I'm dealing with, so along the road I always pick up plants, so Alchemy goes up as well. When I need to cure myself, Restoration is the way to go.
These are my farmer skills so far. Perhaps one day he'll find himself good with a bow as well, who knows.
Oh, forgot to mention, since he didn't start as a fighter I used console commands to set every skill to an inital 0.