Lightroom Classic Profile Confusion

Maybe a few links will help:

https://www.phototraces.com/b/lightroom-raw-profiles/

The following article on Lightroom Tone Control Adjustment should be helpful.

https://helpx.adobe.com/lightroom-classic/help/tone-control-adjustment.html

1 PROFILES not Color Space

The profiles are the analogy's to translate the RAW data to viewable data. What profile you use is a personal preference. Each one is designed for a different look. Their are some Adobe provided ones, and depending on camera, some camera matching ones. Camera matching profiles are very camera specific. You can also obtain third party profiles (often camera specific). The camera specific ones are designed to mimic the in camera film simulations (or whatever your camera calls them). Third party ones, often mimic specific film stock.

(https://www.phototraces.com/b/lightroom-raw-profiles/)

note that the Adobe normal profiles, are their self's, camera specific to some amount. 

IMO, selecting a profile should be Develop Module step one, it is no surprise that Adobe places it up near the top.

Selecting the correct profile for your vision, can save a lot of edit steps.

What profile you select will effect everything that follows. Some edits will look different based on the profile selected.

IMO, if you decide to use a different profile, then start over, do not select profiles upon profiles.

Note, if you want to try different profiles to see what happens, then create virtual copy's.

2. Color Space, not Profiles

As to sRGB, at start, NO, that is a color space, that would be applied at export, and used if you are publishing the export to the web.

Now it should be noted that LrC in the Develop module uses ProPhoto RGB color space, and you cannot change that. Anf in Library module LrC uses Adobe RGB color space., and you cannot change that. This is why Develop previews and Library previews do not look 100% the same, small differences, and why critique should be in Develop module. (https://helpx.adobe.com/ca/lightroom-classic/kb/color-faq.html)

note: you can soft proff to look at how the image will look, sort of.

(https://helpx.adobe.com/lightroom-classic/help/develop-module-options.html)

3. Color Matching Profiles

These are profiles designed by Adobe to mimic in camera settings, The various camera manufacturers have different names for these.

• Fujifilm has Film Simulations (that match Fuji Film stock)
• Cannon has Picture Styles
• Nikon has Picture Control
• Sony has Creative Style
• Olympus has Picture Mode

Cameramatching profiles are camera model/version specific, Camera matching profiles for say a Fujifilm X-T4are not for say a Canon EOS 5, heck they are not even for a Fujifilm X-t3, tnst specific.

 Note that not all cameras have camera matching profiles, Canon users are especially pissed on that one.