I wrote that song for my wife, and it's what some guy who's sitting under a tree would be singing to the woman of his life, telling her how wonderful she is. To me, that's more lasting than something that sounds like it belongs on a movie soundtrack. ↗
In the studio system, things are expected of a film. By the first, second, third act, there's a generic language that comes out of the more commercial system. ↗
As for goals, I don't set myself those anymore. I'm not one of these 'I must have achieved this and that by next year' kind of writers. I take things as they come and find that patience and persistence tend to win out in the end. ↗
Unlike life, you've got more or less complete control over what's going on in your stories. That's not to say you can make characters do whatever you want them to - they usually have a life of their own if you've done your job properly. ↗