What has been working for me (still is progress) is the Energy Awakening Course:
I too felt that I lacked a deep connection to other people. Not that I didn’t care, just that I didn’t feel strong emotions. I don’t know, or actually care, what caused this, but found that becoming more aware of energy made me feel more emotion. Also, because of some of the work I’m doing, I now have a sense of always feeling safe, no matter what happens. I think this allows me to acknowledge my feeling more.
https://gumroad.com/a/362394739/XNcUA would help with that.
Clearing and balancing your sacral chakra might also help you “feel your feelings”.
https://youtu.be/aEpjQGlWSfI
https://youtu.be/5Wjd1baZkOY
https://sapienmedicine.gumroad.com/l/LIwtv?thwepof_product_fields=
But I think it’s most important to love yourself. There are several fields to help with that but you can start here:
Hope you find something of benefit and welcome to the forum!