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What I would do is download VCV rack. The basic set-up is free. I believe that it comes with a knock-off of Clouds. Try your hand at producing ambient sounds in VCV rack FIRST. Once you're able to make something you like, you can emulate your set-up in a real Eurorack case. I'd get the skills first so that you know what you're looking for before spending a small fortune on what you think that you need.

As Lugia stated, you don't necessarily need to use what's currently popular for the genre. It really depends on where you want to go and what appeals to your own tastes.