Figuring out SPARTA (or other spatial audio resources)?

Hello! So I'm new to the world of spatial audio and trying to figure out how to make it sound good. I've had a little bit of success playing around with the IEM Plugin Suite and ATK for Reaper. I have the SPARTA plugins, as well, and I hear they're quite good--but they're the least intuitive to me so far. I've looked for tutorials but I can't really find any.

Has anyone had luck figuring out these plugins?

Alternatively, are there any other methods for spatial audio processing that you like using? My main use is creating immersive audio narration: soundscaped scenes for stories, ASMR, stuff like that. I've only got headphones to work with now, so I'm aiming to create binaural audio specifically.

If anyone has recommendations for any of the above questions, I'd appreciate it a ton. Thank you!