There is no concern about having a "too low level". However, I believe that you should try to do some quests in Wintertusk (if you haven't done it yet) to gain a bunch of xp and level up. Things will get A LOT easier as you'll have more life, the ability to get better gear and, of course, new spells (the level 55 and even 58 one). If you feel that your level is fine and you don't have a hard time questing, then it's ok for now but think about the fact that later in game you will feel much more comfortable about having the advatages I have mentioned above . Good luck in you future adventures!
I am lvl 55 in stormriven, only three levels above, and managing fine. Depends on your tactics, though.
Yes. Tactics. I entirely forgot I posted this! LOL! 56 in stormriven hall now, but at present I can't be bothered doing kraken up. (My quest) and am working a little bit on mirkholm keep... Humph. Not much XP to go around. At all. Patience though, Yes Mrs greyrose, is the key, it seems.