It's a chore. Experienced bowlers have a good feel for what types of balls works for them and what doesn't. There's a ton of balls on the market these days so it's mostly just sifting through the masses to find what you need. Personally I feel like watching other bowlers, that throw the ball well enough to get a good read on it, whose game you know well is one of the best bets. Firsthand experience in an environment you will be bowling in is better than any video you can watch online... unless it's someone you know at the alley you bowl at.
For a new bowler such as yourself the best bet is probably just buying something and trying it to see how it reacts for you. It could be quite different for somebody else. That might get a bit pricey but that's just how the market is today. Narrowing down your options by specific ball motions helps.
Starting with the Outcast was a good idea since it's one of the lower-end balls. Makes more sense than going from the top to the bottom since most don't need the absolute strongest balls available.
Good coaching, if available, is also a lot more important than buying equipment for beginners though. That will give you a solid fundamental base to actually use various equipment. And a good coach could steer you in the right direction of what types of balls to buy later on.
