Lyrics are the easiest part of the song to write imo, just think of it as poetry that fits the music. But if you don't like writing at all, then you may have a problem.
Just think of lyrics like the music in word form. Translate what the instruments are saying into English, and you will be done in no time.
First, you want to collect your ideas. Write a story or some personal feelings down on a piece of paper until you have enough fodder to last your mind until you are finished.
Next, you want to think about structure. You might want to try the bog-standard verse+chorus+verse+chorus+bridge+verse structure to start out.
Word choice and style is next. Just listen to the music (melody as well, if you have it down already) and write down whatever comes to mind. Make sure to use your own words. You don't have to rhyme, but if that is your thing, go for it
If what you end up is satisfactory to you and makes you proud, you now have your first song lyrics down
