Some good advice above.
Pick a ball that you can afford, that you like to play, and stick with it. Having a trunk full of differing balls is a waste of money since you can not, according to the rules of golf, play different ones during a game. Don't even buy different colors of the same ball - you cannot mix and match.
I played with 10-credit and then 64-credit sleeves for a long time while learning.
When you get low on a brand of ball, just go out and practice with the last one until it goes.