With the Libero position, the majority of college volleyball coaches are indifferent about height but all of them are focused on ability. If you can pass, play defense, work hard and have a positive attitude, then you will have collegiate opportunities.
Please remember that D3 is the 'academic' category of the NCAA, with athletic scholarships not allowed - They do award academic, merit and need based scholarships. I would suggest that you open yourself up to NCAA D2 and the NAIA organization which allows athletes to combine academic, athletic, merit and need based scholarships.
As a Libero, I would not stress about not having played club volleyball up to this point - With you entering the 17's year of club volleyball, you have two full years to develop your skill sets and promote/market yourself to college volleyball programs. The majority of Liberos/DS tend to make their collegiate selection as late Juniors and/or Seniors.
What every recruit must remember, no matter their age in school or what category and/or division of college volleyball they are trying to achieve, is that today's recruiting environment is fluid - Change is the new normal. Coaching changing jobs, players getting injured and placed on medical scholarships, players quitting, coaches cutting players when taking a new job, coaches cutting players who have a bad attitude or just did not progress as anticipated. All of this fluidity in college volleyball (and collegiate athletics) leads to opportunities becoming available all the time.
Focus on improving your skill sets, focus on reaching out to colleges and managing the process - I strongly suggest you take a look at NCSA Athletic Recruiting and definitely take advantage of their Free Site!