Welcome Alex! I grew up in Blacksburg, VA (if thats where you're from). Great place to grow up!
I agree with the advice Lefty's Dad gave to you. If you had a fantastic freshman year on varsity, go ahead and send them...but as he says, they can't do a whole lotta responding for now. Your letters will go into their files.
Through 2 sons who play or played D1 college baseball, we started the contact activity early in the Fall of their Junior year in HS. Some schools did know about them before that, but they just communicated with their coaches at that time...seeking HS coaches' opinions, etc... There was no huge reason for our sons to be involved in that so early in the process. We kept their heads down and focused on becoming better at the game.
For now, I would focus on doing everything I could to making your HS varsity team as a sophomore, getting onto a good travel team for next summer...but most importantly on working on your game this off-season. Reps, reps, reps...for hitters. Mechanics and command of pitches for pitchers. All with a reputable instructor if you can afford it.
Best of luck!