Step 1: Get yourself a quality sack.

              Before you can become a master sacker, you're gonna need a good hacky sack. The first thing you need to know is, being a beginner, you will be terrible. Most kickers start off in freestyle footbag (see Step 2) because it's the most casual and can be played by yourself or with friends. What this means is that anyone just starting to dabble in sackery will mess up and either kick the ball way too hard and send it flying or just miss completely and it'll flop dead on the ground. At this point you're going to need a durable hacky because the easiest way to pick it up (see Step 3) will quickly obliterate your hacky sack, leaving it a flappy, mangled cloth. 
              This starts us off at the outer layer. The skin of your hacky sack should be a good balance of durability and softness. A stiff and over packed ball will be too hard to control and (believe me), will just make you frustrated. I recommend a synthetic suede skin for your sack, they're not expensive and they play well. If you're really terrible and just eat new ones for breakfast, then I recommend the most durable types of synthetic suede, these are ultra-suede and poly fleece.
               Next comes your filling. Inside the skin of your ball, there's a plastic bag that can either be filled with plastic pellets or sand. Each kind has it's perks and is suited for different styles (see Step 3). For a beginner, the best kind is the plastic pellets because they're easier to find in stores and they're good for most kinds of game play.
               Now that you know what you want for a sack, there's different patterns and designs that are out there that will add some pizazz to your style. This is totally up to you. My fist sack was from the dollar store but i went through like one a day and like a trip a week. If your Mom is like my Mom, just spend the little extra dough and invest in a decent sack. Trust me.