How old is your child? My child is 2.5yo and as a start we try to have her to understand and identify the various emotions that she and us experience. I point out to her matter-of-factly that she's having a particular emotion. Eg: "You are upset because I need you to keep the toys." or "The child over there is crying, I think she is upset." or "I am angry when you throw your toys at me.." and of course the positive emotions, "I am proud that you shared your snacks with..." I also offer alternative safe behaviours to certain emotions, eg: "I know you are angry, but you cannot hit me, if you like, you can hit the pillow." We also read the "When I'm Feeling" series of books by Trace Moroney, I find that the book does help in getting her to relate to the different kind of emotions. http://www.tracemoroney.com/books.html Hope this helps!
I read this article because I found it interesting to talk about emotional intelligence maybe you may be interested, it helps me to understand more. https://janabebe.com/en/blog/emotional-intelligence-how-to-develop-it-in-children.html