I wrote this over a year ago, might be of help:
https://discuss.pixls.us/t/article-color-management-in-raw-processing/11521
Essentially, you’ll want to make a calibrated profile for your monitor soonest. However, if it’s gamut is indeed 99% of AdobeRGB, you could try setting an AdobeRGB ICC profile as the display profile. I currently use a sRGB profile on my tablet in this manner (I have the device, too lazy to do the calibration… ) and it looks okay.
With an appropriate profile set for your display, the software will look for a corresponding profile that describes the image gamut and tone. OOC JPEGs typically don’t have an embedded profile, just a tag that says, “sRGB”, so dt has to have an appropriate profile internally to use. With that profile assigned to the image, the image is transformed for display using it as input and the display profile as output.
Same thing with the raw file. For this, the input profile needs to be one that describes the camera data, these profiles are specific to a camera model. Most raw software has a humougous data set with all the supported camera data, because most cameras do not embed this data in the raw file, go figure. (well cellphones that produce DNG raws do, but they have proven dodgy, ask @Entropy512 )
If you’re playing by the above rules, an image displayed on your monitor should look the same, no matter what colorspace it’s encoded with.