-Buy a gun that will motivate you to shoot it.
-learn the basics of how it works. Dry fire at home.
-once you've reached a level of comfort, go to a local match. Maybe steel challenge to start if you have it near by. Look on practiscore.
-go to a match with movement IDPA, USPSA, etc.
-watch ben stoeger training videos on YouTube.
-dryfire some more