Howdy! I'm sorry your first foret is giving you fits! How are you connecting things? The Laniakea ought to be sending continuous sound, without anything from the akai connected. There's a rich backlog of information both on this forum and over on Modwiggler where you can dig into some primers on different module types. My introduction to the modular world was through the videos of Mylarmelodies which are great!
For now I'd recommend getting a 1/8" to 1/4" cord so you can run the output of the Behringer interface straight into the Akai to see if you can at least get some sounds. I'd recommend a quad cascading VCA (like Intellijel Quad VCA or Mutable Veils style) and some kind of envelope (Maths is sort of the gold standard multiuse modulation source for learning a lot of modular/voltage concepts. Look up the illustrated manual supplement to see all the things it can do!) With just the oscillator, I dont think the akai gates are going to be very useful, but they can certainly trigger envelopes so you could control volume or other parameters in time to what's happening on the akai. Happy patching and I hope you have better luck once it starts making sounds!