If your son professes genuine interest in college ball, I would suggest you arrive 2 hours before game time and stay until the last player leaves. Then he'll get a better idea of what the commitment is, on the 4-5 game days each week. Better if you don't attend a game at an Astroturf facility, so that you can see how much yard work the players are conscripted for.
If he gets closer to the end of HS and is still interested in pursuing it, then a visit to a practice day is also very enlightening.
I can't tell you how many guys prep themselves for college for years, only to find, when they get there, that the workload is overwhelming. A lot of talented guys end up not enjoying the totality of the experience at all, and many end up quitting. Especially when some of the alumni visit and talk about what life is like in the minor leagues -- a lot of guys lose interest when the dream comes face to face with the reality.
If your son goes in with his eyes wide open and still wants it, THEN you know it's real for him.