I'm happy to see you getting serious about all of this. Here are a few sites to get you started. Study your favorite song writers and learn from their arrangements. For example Elton John and Bernie Taupin were a great Ballad writing team. Study Desmond Child for Pop rock and Max Martin for modern Pop. Study Dylan for Folk and Americana. Study Fagan and Becker for for Jazz/Rock fusion. I'll add a general rule that was not mentioned in the links below. Write sad songs in minor keys and happy songs in major keys. Good luck!

[bmi.com]

[mysongcoach.com]

There’s no copyright on chord progressions. Borrow some from songs you like and make the melody and rhythm your own. From Bach to Beatles you’ll find similar patterns through the past 300 years or so. Also, try this.....

See if this helps:

I have the same problem, and I’m not super experienced at getting past it but I think some relevant things to consider is that writing poetry/prose isn’t the same as writing lyrics. Having well defined meter isn’t really a strength if you don’t have a clue as to how to sing it. And a lot of the best lyrics don’t have a consistent meter or rhyme scheme when you think about it. I think I’ve read and heard that some of the best songwriters start with the music or at least a melody and sorta freestyle brainstorm the words to fit it for this very reason: that it’s so hard to take words and then figure out how to sing them.

If I was gonna get serious about trying to write originals again I’d focus on writing some good music first, at least have a chord progression and a melodic idea and feeling in mind and then write the words with the music in mind. Writing music with words in mind always made me feel like I had heard this before n I was ripping something off inevitably or it just sounded corny. The only successful original I wrote was with a songwriting partner and we started with a lyrical idea but didn’t work on the words until jamming a chord progression out and it seemed to work pretty well that way.