Use "Live Another Life" mod and just don't do the Bleak Falls Quest.
You can give yourself many role playing starts, both good and bad.
This takes the world weight off your shoulders and truly allows you to play as you wish.
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I used the Live Another Life start as "Left For Dead" and started out with nothing. just old clothes.
On this playthrough, I only earn 0.05% experience in most stats.
I set my magicka to zero (player.setav magicka 0) - No Magical use other than staffs, scrolls, potions
All barters are an additional -20% to sell, and +30% to purchase. - Not getting rich either
I set all magical skills to gain 0% experience
Finally I set blacksmith, Enchant, Alchemy to only gain 0.01% experience.
I just hit 9th level last night after many hours from level 8. I've visited many parts of Skyrim (and modded surroundings) struggling to get through it all, much like a commoner.
Much of the healing is done by way of cooked foods.