As the Dad of a father who just finished his college playing days, my advise would be the same, don't give up. While an adjustment might be needed, you would be surprised how many spring signees ended up playing a significant role and more.
+1. If you want to play college baseball there are opportunities out there. Don't give up.
My oldest son just graduated college after playing 4 years. His recruitment was not typical and a lot of hard work. My youngest (late bloomer) wants to play in college despite a recent injury that he is re-habbing. He isn't giving up at all despite casual interest & recruitment. He plans on walking onto a D2 or D3 program in the Fall after he is accepted. By no means is this chapter closed for him. He is more determined than ever.