Solid comments above. Total unknown with how Covid pans out.
Now: focus on strength and speed, and refining glove and especially bat. You as parent: help to find baseball specific strength style training, and some sort of speed coach. At 5'8 if he gets to 160 with strength in the right areas he'll be fine. Decent glove with obvious bat and speed will be the difference maker.
Spring Junior year email campaign to the targeted D3's that your son deem a fit. Also email few weeks prior to showcases. These HC's show up with a shopping list of players they want to see. The metric portion of the showcases are filters for the HC. Be prepared to light it up.
Educate yourself up on the pending financial commitment. The HA D3's have strong endowments and need based financial aid (anything less than 180K AGI "can" get aid).
Find a good ACT/SAT tutor to prep so he can have a score early Junior year. That will be a filter whether certain schools are realistic. With tutoring help 3-5 point gains are possible with the ACT. As a player it's more difficult to get into a JHopkins, MIT, or Amherst than an IVY. Ivy coaches have more flexibility. Look at the accepted student ACT scores, that will guide you. The HC's will be very specific that you need a 28, 30, or 33 to have a chance for admission even with their support.
Regardless of it being D3 or HA D3 or IVY...the coaches are still baseball guys looking for the best talent they can get. They hope that player has the academic chops.
My son hit a few camps summer of incoming junior year and the fall of junior year that prepared him for the following year showcases that would count for HA D3 opportunity's. But looking back, doing 1 or 2 camps prior to senior incoming summer would have sufficed. They can be expensive. Deploy the extra dollars toward your sons development, training and tutors.
Good luck