First thing, be a hitter. You hit, you play. Then work on being as big strong, fast and as athletic as possible. Players get to college and have their positions changed all the time. Recruiting is generally up the middle. Corner players have to mash.
A ranked college team a friend’s son played on recruited four stud catchers over two years. Then they moved the outfielder with a cannon to catcher. The recruited catchers could all hit with power. They played 1B, 3B, RF, LF and DH. Eventually, after graduation of the starting catcher two of them rotated as catcher. One is in his 9th season as a MLB catcher.