This little filly is NICE NICE NICE.Other than a slightly tall wither (very typical of this breed) and a neck that ties in high because of it, I can't find much wrong with this horse. Nicely laid back wither, strong open hip, straight legs, good length of back and strong coupling. She's a bit wasp waisted but I've found that racing conditioned TBs loose this once they stop training most of the time. I really like her and think that if she enjoys it, she can definitely go the eventing route. I'd actually like to see her do a little show jumping.
However, just as a word of advice, you might think about giving her some time off from riding and let her grow a little more. She's very young and too nice to mess up by pushing her too quickly. What does her pedigree look like?