Around level 8 I got the first Companions quest, which was (a radiant one) to go to Dark Fang Cave and whack some vampires. After 6 or so attempts I manage to kill the first one and several skeletons in the first room. The two I encountered in the next room were impossible for me, so I left to do it later.
Now I am level 10, and I encountered a troll and frost troll that were impossible for me to kill. The frost troll kills me in 3-4 hits, and my attacks on him seem to do nothing to his health bar. Just before the trolls a dragon attacked me, and 10 tries later I finally beat it. Why are the trolls harder than a dragon???
So, the last thing I did was find the Greybeards and get the additional voices. However, it seems I can only kill bandits, wolves, and frost spiders.
I have improved my armor and weapons as far as my level will allow, but none are enchanted yet. I found few soul gems but no soul trap ability.
I am following the story path as I go. Am I doing it wrong? It doesn't feel right that I am so weak at level 10. Or is Skyrim like Oblivion with OOO, where you can expect to encounter creatures and NPCs you can't defeat at your level?
Thanks!