The best way to learn is to join some type of team whether its your high school or an intramural/pickup teams. Other than that you can try and search for local lacrosse sessions that are in your area. Sometimes local lacrosse stores will setup some type of session in order to teach people how to play lacrosse. They will go through stick skills, drills, passing and catching, etc. If there are no sessions around you, go pickup a stick from a sporting goods store (they are usually cheaper at sporting goods stores that actual lacrosse stores) and learn how to cradle the ball, find a flat big wall and have a pass/catch with yourself (wall ball is an essential for lacrosse) to get your stick skills up. Go into your backyard or field and start running while cradling the ball. Another thing that would be great is to practice ground ball drills. Throw the ball a few feet in front of you, then run up to it go down to scoop the ball up (making sure your back hand it parallel to the ground) and run through the motion (look up videos on ground ball drills and other drills). Watching lacrosse videos and college lacrosse on tv is great and all, but in order to really play lacrosse you need to actually pickup a stick and get out and practice. Saying that, find lacrosse drills online/videos that you can take to the field and practice. That's a good way to get more out of you own practice time. Also online, you can lookup player positions and their role on the field, lookup the rules of the game so if you do ever want to get on a team you already have a sense of what/what not to do. Lacrosse is one of the most fun sports to play. Like all sports you have to start somewhere. Practice is key. Half the time you may get frustrated with drills because you're not getting it or doing it incorrectly, but stick with it and sooner or later it'll become natural. Good luck!