You've got to really be able to accept the rejection.
You have to be very brave in that first writing session.
Probably most successful songwriters have an innate songwriting ability.
A guitar riff played on a piano doesn't come close to the purity of it being played on a guitar but I faked it enough to get by.
I get a different kind of lyric from someone else that might make me go in a different musical direction.
It's very hard to teach someone how to write a song if to begin with there's no creative crop to harvest.