OP, you’ve done this before and you know it’s really a bit too early, but what could be super helpful is to use current experience to identify what kind of learning environment would be best for your son and his LDs. Specifically, how do the LDs manifest?
Some kids (mine included) felt pretty strongly that he’d be more attentive if he could be actively engaged in class, so focused on schools with small classes. Whether it was the fear of being called on, getting that burst of adrenaline from speaking in class, feeling comfortable chatting with the prof – it worked for him.
But other kids may do better if classes are recorded and they can watch again, pause and take notes, etc. Or they may benefit from photographing what a prof is showing (which may be more polished in a large lecture.)
So much of this depends on what exactly happens as a result of an LD and the strategies your kid uses to address them.
Most of us feel kids won’t fall thru the cracks in a smaller setting, but some kids can avoid the cracks better in other settings. Just tossed that out there as you have the time to assess this thoughtfully.