The "serious" part is something that is vulnerable to so many things, from 13 years of age, onward. Focusing on something that far away is good, but I would suggest putting his sights more in focus with current things.His academics are, and should be his strong points for any college, as is his ability to stay eligible once college is nearer.
I would also suggest that you, his parents, use your maturity, you life experiences, and your fact-finding of what college involves, once your son has his sights set on what he really wants to do. College choices are numerous, as are locations, tuition, meal plans, and so forth. Usually, once a youngster turns 15 and 16, his objectives should be clearer, and his athletic ability should be pretty well know. Below is just one publication, among others, that can help you with helping your son,\
I'm not promoting any product or services - give a sample to the publication called TUFFCUFF authored by Steven Ellis.
If your son has any desire to play college ball, this publication will give him, and you, some idea of what to expect.