At the bottom is a post I wrote from a thread in Sept to a high school guy asking similar questions. You may want to skim whole thread. Bottom line-most of the 400 3 stars through blue chips for each class year are extremely motivated, giving 100%+ and they have 4+ years on you, 3000+ drill and matchplay hours on you and the experience of 400+ USTA tournament matches. Most of these guys will be UTR 11.5-13+ by the time they commit to college. If you are just a high school player for an average team, you are probably a UTR 6-8. If you work really hard, maybe you can make it to a 9, 9.5 or 10 in the next 18 months if you practice/play 15+ hours a week every week. Get a free membership to UTR or TRN. See where the guys are going to college with UTRs below 10. You might play D3 or low D2/NAIA but you will not get athletic money. Aim for a school where you can get merit $. Even if you get on a D3 team, that does not mean you would play. Many D3 teams have rosters of 15+ but only 8 guys play regularly. That said over 800 guys for the class of 2015 committed to play tennis somewhere, many with low UTRs. The guys with the low UTRs are primarily on D3 rosters, again doesnt mean they will play. I know guys that have played for 6+ years, played on high school state championship teams, and either now are playing tennis on campus (club) or hope to walk on a mid major D1. These are guys who have been serious about tennis since they were 10 or 11. A late bloomer is one who starts at 12 or 13. I know another guy who is totally homeschooled, his parents have paid for the best coaches and 20+ hours a week for 4 years so he could try to catch up, and he is right at the 3 star/4 star borderline. He has made tennis his top priority for 4 years and he still has not caught up to the guys who started 2 years earlier. Tennis has one of the longest learning curves to reach a high performance competitive level. Once you get there, you have to constantly maintain your level. If players dont keep training and playing tournaments, their level of tennis drops. 5 stars become 4 stars.
https://tt.tennis-warehouse.com/index.php?threads/are-full-rides-likely.544057/
Here is another post that mentions opportunities at all levels, but the club tennis at big schools is a higher level than the bottom levels of intercollegiate tennis.
http://tt.tennis-warehouse.com/inde...ge-tennis-players.525725/page-2#post-10171699
Also, to be noticed, you have to dominate and go deep in high level sectional and/or national tournaments. However, you have to win matches and points at local (district) level before you may be able to get in sectional tournaments. You have to go deep at the lower level sectional tournaments to get in mid or higher level sectional tournaments. Generally college coaches only attend the level 1 national championships but some will attend high level sectional tournaments to see players they are already recruiting.
In any sport, especially a high skilled sports like tennis, most of the guys who end up playing for a decent college team have been playing at a high level since they were 12+. Starting a sport as a freshman means you are years behind 95% of the other guys seeking college spots. Train all you can, play practice matches all you can, play at least two USTA tournaments a month, and pursue opportunities at D3 and low D2/NAIA.