Before you give any style a workout, why not tune in to a radio station (a million to choose from being streamed on the internet) that specializes in that style?
Train your brain, and your fingers will follow..!
Reggae, salsa, Conjunto, cajun country, Austrian Waltz... There's probably a ton of styles you play very seldom. But listen to a half hour of that style of music ONLY on the radio, and I guarantee, you will be incredibly ahead of the game when you start to play.
Half of the battle is knowing when you are wrong, and not doing that again! But if you don't listen to enough of it, you'll never know, and just keep plowing on!
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An arranger is just a tool. What matters is what you build with it..!