Writing songs is a lifetime process. Just write something that moves you no matter how bad you think you are. I think most of us get hung up on writing the next great tune. I think that paralyzes many. Too much pressure and you don't give yourself the pleasure of writing a bad song. If you don't write a bad song, you can't write a good song. You won't know the difference! So write some bad tunes and laugh at why they are bad. Then try writing a little bit better song and so on. I think all the greats did this until they found their style then it was all just a matter of tapping into the muse. You have to start that conversation, no matter how awkward you can feel about it.