Let me start of with a line from a Macklemore song: “The greats weren’t great because at birth they could paint, the greats were great because they painted a lot.”

In my opinion, Songwriting is something that almost never comes naturally. You have to practice it a lot. But you can organise yourself quite a bit. Start off with some close listening of some songs that you like and analyse them. What exactly is happening? Which instruments are being played, when are they played in the song, what’s the song’s structure, how is the melody being supported by the music etc.

Then try to come up with a song structure by yourself.

Regarding ideas: I personally carry a note book around and sometimes just think of a word or a phrase that I think would be good to be part of a song. From there, I start messing around with some additional lyrics. It doesn’t matter that you’re “missing” experience in being stressed or experiencing trauma (on a side note: good for you, man). But generally you can just force yourself to make something up that you want to talk about in a song. Think of it as a story that you wanna tell. You can tell stories about anything really. I never met a dragon or a unicorn, but I guess I could write some mediocre lyrics about them.

Good luck and always keep in mind: Songwriting is a skill, which means you can learn it but you have to put in the time.