There are many different chargers to start with. Some people say to start small with a Squiffer or bamboozled and work your way up to the E-Liter, but I personally started with E-Liter and tried the other ones later on. I suggest trying them all out and seeing which one you like most, because there's lots of options to choose from and factors to consider! Do you want to use the short ranged ones with a short charge time, like a Squiffer, something in the middle, like a splat charger, something with long range but a long charge time, like and E-liter, wether or not you want a scope, and your favorite subs and specials. Eventually you'll find something that you like.
Hope this helped!