So I'm a new Fuji user -- recently upgraded my old Nikon D5300 to a new Fujifilm X-S20 cause I wanted a lighter and smaller overall package for vacations and family trips. After a bunch of research regarding postprocessing, I decided to stick with using Lightroom with AI denoise to edit all my RAW files. I have a couple of questions about using Denoise and best practices, and how other people do it.

1. Should I use Denoise for every image, including those shot at base ISO? I understand that the basic Lightroom demosaicing is not that great for Fuji RAW files, and I think Denoising demosaics as well. So my gut says yes, but I don't want to unnecessarily process images that won't benefit from it.

2. What settings do people use for Denoising at different ISOs? I know it's going to depend on each image, but it'd be nice to have a baseline for "somewhere between x and y for ISO of 1600 to lose the noise but not make it plasticky," for example.

3. I want to save the RAW files but not the DNG files since they're huge and storage isn't free. Since Adobe recommends denoising first, how can I ensure I not lose my post-denoising edits?

And lastly, two quick non-denoising questions:

4. What color profile do people recommend using for Lightroom? I don't care for any specific film simulation or emulating a film look - am I better off starting in Adobe Color compared to the camera profile? Or does it not matter?

5. And what film sim would be best in camera to better view the dynamic range of the final RAW file? So I don't end up underexposing thinking my highlights are blown when they're not actually.

Thank you in advance!