Yeah, for anyone still a little wary of running fractals over 10 as a first-timer... Don't worry.. My first run was a lv 14 or so and it went fine.. Actually had fewer deaths than I've seen in normal dungeons, and the people I ran with said we ended up with two of the more difficult fractals.
Difficulty shouldn't be a barrier.. As stated above, as long as you're 80, have decent partying skills, and at least some familiarity with dungeon runs (and decent gear, of course) it shouldn't be a problem.. When I ran my first I had ZERO agony resistance, and I still never died to anything agony resistance would've helped against. As long as you're in lv 80 gear (preferably mostly exotics, but when I ran, armor and weapon were the only exotics I had) you're fine.
Time and experience are the only real barriers, and as long as at least one person in the party knows what he's doing, the experience part can easily be worked around. Time, on the other hand, well we can't just create extra time for ya, but we would if we could :)
In short, if you're even a little curious about fractals and some of the rewards possible from them, give it a shot, they aren't as bad as some people seem to think.