You find a way to play in front of them...travel team, camps, showcases, HS ball if possible...and they will figure out if you're a) a good fit talent-wise for their team and b) a good enough student to play at their schools.
Both of my sons were pretty good students, but virtually no school would admit they were good enough students for THEIR school until they decided they wanted them as baseball players. Then...they were good enough at both (baseball and academics).
Based on your grades, don't spend your $$ on Ivy, Stanford, Vanderbilt or Duke camps, but otherwise let them figure it out. Its really about that simple.
And...welcome to the hsbaseballweb.