This is what I have found is effective. Print a test image of known good quality image such as a printer test image. View the image in a imager viewer and adjust the screen bightness untill it best matches your printed vesion of the image. You may be suprised how low you need to set your screen.
Fuji Crystal paper & Fuji Frontier printer: Costco.
I do use their profiles from drycreek, the colors are good, but it’s just too dark. In Darktable I would use the level module are up the middle tones by .5 and that would do the trick, but I have found a “level” equivalent in RT.
I just bought on amazon a Spyder Pro (very good sale in Canada, not in the US). It should take about a week to 10 days to get it delivered, then the calibration…
But this brings me back to the question I had about RT, how can I emulate the DarkTable level module?
I want to change/brighten the middle tone and not touch my white pint/black point.
I think what would be equivalent is to open up a custom curve in Lab tool or one of the two in Exposure, put a point in the middle and move it north west a bit. If you find a position you particularly like you could note the exact coordinates or save the curve I think. (I haven’t read the references above though)