Q: I wrote a bunch of songs but they suck. How can I improve them?
A: don't do that now. just write more. improving already written songs is a bit more advanced, i think it is more important that you push forward and write many more songs now. you will start to get better, and it will be helpful to Not plan on improving them, because that will give you confidence to move forward without constantly questioning everything. After about 100 songs, if you are still alive, then you can start going back and improving some of them, and by then i think you will have much broader experience of what works and what doesn't, and you will be much better able to hunt down the right solutions for each unique song. improving songs is a tricky game, every song is like a sick baby with its own special disease