You have posed a good question. A few of my thoughts (other than wear sunscreen and don't eat processed foods:
1. Doubt means Don't. This is good advice for buying used cars or considering sky diving. With your volleyball, it means Don't blindly do what others are doing.
2. You still need to let your abilities blossom and your mental comfort zone develop. All of us wish we could know what we will want/feel in 5 years. If we knew that information now, life would be a heck of a lot easier!
3. If you are enjoying playing volleyball right now, then keep playing volleyball. If you are not enjoying playing volleyball right now, then you should not be doing it - Volleyball is not mandatory, like education or eating leafy greens.
4. A wonderful attribute of collegiate volleyball are all the levels; you mentioned DI and there are many different DI's - big, small, academically elite and average, small towns, big cities, etc. What about DII? There are outstanding academic institutions which sponsor DII volleyball. NCAA Division III is focused on academics, and volleyball is a small (but great) part of the experience of going to a college where you don't have to be 24/7 volleyball.
5. You have to reach out to collegiate programs - gone are the days where they automatically find you. This is especially true if you are on a small, non national club volleyball team. There are just so many tournaments, so many club teams and so many players in today's volleyball recruiting world that collegiate coaches can't automatically 'see' every PSA. Find out if they are interested in you by sending out your video and volleyball resume - Much like applying for a job.
You mentioned you don't have that 'gut feeling' - Collegiate athletics mandates that gut feeling, even at the less time intensive category of DIII. You gotta know you want to be a college volleyball player because of the demands/rewards of this obligation.
My closing argument - Keep playing only if you enjoy playing now. Send out your resume and video in the fall to get some feedback. Enjoy being young!
Coach Matt Sonnichsen