A simple way to play with this would be to apply a Film Simulation
https://rawpedia.rawtherapee.com/Film_Simulation
Here is a free LUT I have found that works well for adding warm tones to an image
https://freshluts.com/luts/683
And here it is converted to work with RawTherapee
By the way, before FreshLUTs are licensed under Creative Commons CCO. "You are free to adapt and use them for commercial purposes without attributing the original author or source. "
https://freshluts.com/termsandconditions