Hey Daniel
Melody and lyrics is already a big big part of songwriting, so good job
I've written an article about songwriting, it has some info about structure, chorus specifics and chords: http://blog.sofasession.com/how-to-write-a-song-in-10-easy-steps-beginners/
In case you play the guitar, here is a very specific guide for chord progressions on the guitar
http://blog.sofasession.com/how-to-write-a-song-on-the-guitar-hands-on-tutorial/
I hope you can find some helpful tipps there. All the best <3 Natalia

Melody and lyrics is already a big big part of songwriting, so good job

I've written an article about songwriting, it has some info about structure, chorus specifics and chords: http://blog.sofasession.com/how-to-write-a-song-in-10-easy-steps-beginners/
In case you play the guitar, here is a very specific guide for chord progressions on the guitar

I hope you can find some helpful tipps there. All the best <3 Natalia