Addendum: Oops, forgot about OP.
OP, on your first run, I suggest you just play the game without trying to figure out the ins and outs of the mechanics. Skyrim was created in such a way that you create your character through
action rather than
choice. So if you get into a lot of melee combat, you'll level up your weapons and armour; if you use a lot of magic, your magic will level; etc.
Just start the game up and follow the story and your whims. Forget about gaming the system and min/maxing your character at least until level 25.
You'll be doing yourself a huge favour.
I mean....that is still a HUGE amount.
Oh ja, it's definitely a good amount; I didn't mean otherwise. And a good portion of that 10% significantly improves/alters the game.
Quality over quantity.