You need to begin in your freshman year.
Make sure that you speak to your counselor and let him/her know that you are interested. This way, they can put you in the appropriate classes throughout your high school career.
In order to be eligible to participate in recruiting by college coaches, you must sign up at either the NCAA or NAIA Eligibility Center. Please talk to your coach and see where they would recommend you sign up.
See the checklists and charts below for more helpful information.