I don’t have a resource, but you’re not alone in this - I struggle with this too (usually while walking away and going through my mental conversation checklist realizing that I’ve forgotten to ask people about themselves…). I do genuinely care, I just want most social interactions to be over asap and have about a dozen dvd logos bouncing around the corners of my brain lol.
I echo what others have said though. For me it’s like any physical exercise, repetition and training are key. And learning my own boundaries around mental/sensory overwhelm; because if I’m overwhelmed but ask out of obligation and then someone starts talking about their issues, there’s a non-zero chance I’ll immediately glaze over.
Best wishes on your journey! It takes an effort for sure, good on you for trying