I will be blunt (and it is only the opinion of an anonymous internet poster, so take it for what its worth).
Your current baseball skills will not open any college doors. Without resources (i.e., $$$), you can't catch up with HS varsity players, much less those who go on to play in college.
Your history gives no indication of either the ability to recognize how hard it is to play college ball or the ability to work hard at anything. Indeed, the PRIMARY HS measurement of hard work is grades and your scores and grades are a mismatch - indicating you will not work unless YOU feel like working. This is antithetical to a baseball player who grinds and grinds and grinds for infinitesimal improvement.
Your history shows an inability to grind after failure. Baseball is a game of failure. We have lots of posters whose kids didn't make their first HS team; some moved on to seek other interests, but many others redoubled their efforts, addressed their skill weaknesses and made the team the following year. You will never - skill-wise - catch those kids; and MOST of those kids will not play at the next level
You put down the glove and cleats - and waited over three years until college app season passed before deciding that baseball throbbed in your heart. AND, you freely admit you're trying to use baseball to leverage into a school because you're not satisfied with your current college options. (Curiously, your post only appears AFTER media coverage of the athletic "side door" to admissions, so I question your baseball commitment.) The only way you'll play baseball in college is to show up in the fall (after matriculating) and outplay guys who have played virtually every day for over a decade; and that's what baseball is - beating your compeitition.
There are NO baseball shortcuts; there is no cramming (like for exams or the SAT); it's a long, frustrating path replete with some successes and many failures. Can you look at your history and point to any activity you've done for over a decade with similar characteristcs? Can you point to any successful long range planning you've done?
Life is a matter of choosing between many options. Sometimes choosing one option burns other options. It's no big deal, it's a routine part of life. Sometimes the path chosen turns out to be a poor choice; and many times that choice is really no big deal in the grand scheme of life. Hanging up the cleats early in HS is one of those choices; it's a minor decision in the tapestry of life with NO long term ramifications. So, look inside yourself and analyze why you followed the path you choose. Learn from what you now believe was a mistake. What were your reasons, your motives, your goals in reaching the decision? Apply what you learn to decisions which will arise in the future.
I'd save your time, money, and energy in what is destined to be a futile baseball effort. If you want to leverage athletics to get into a school, take a PG year, learn crew, and train relentlessly. If a school has rowing, there are (surprisingly) way more rowers than baseball players and, therefore, more opportunities in rowing.