You start by reading or listening to lyrics. Then do it again. And again. Then write something. Then repeat the former. Very quickly you start developing a taste for certain lyrical qualities say, I think these lines "the cities we passed were a flickering wasteland / but his hand in my hand made them hale and harmless" are pretty damn awesome. The tricks/techniques must be your own. No one can help you, you have to help yourself. There are certain things I can tell you, but in the end you have to do it by yourself. It's tough and you will face failure, but then again failure isn't so bad.
Of course some people are gifted with a disposition for these things, but all writers have started out as amateurs.
I sought help as you do now for a while, and I still do sometimes - in wise people, what they've said and done. But nothing comes out of that, except temporary relief of doubt.