Good job for a first song. Keep developing your skills. Push yourself to write a song a day, without thinking too hard about it....speed writing! These songs may not win you a Grammy, but they'll get your brain working and start you off in the right direction...like exercise for an athlete- song writing practice! Soon enough you'll see the songs will just flow out of you.
One other thing that helps is creative writing classes. Even if you have no interest in storytelling or writing- beyond song writing- it will help you with cadence, word play and creativity/imagery in your songs! Cheers!
