What are some resources/tips/techniques for using self-massage to work with one's emotions?

I’m interested in using self-message to work with my emotions, with a particular interest in using it to work through emotional numbness/reconnect with my emotions. I have enough personal experience with this to believe this is an avenue worth investigating, but I also am basically a total beginner when it comes to massage. Where should I start/what do I need to know? (Where in the body should I consider working, and how? What sort of mindset do you reccommend bringing to self-massage? What about temperatures, oils, etc…?)

I appreciate you.