2 years ago i would have said "i'll never be able to write song lyrics."
everything takes practice. the more you do it, the easier it will come.
people take easier to some things then others, but you can pretty much do anything if you have the passion and the patience.
of course you can have all the passion and patience in the world, but you'll never be able to catch an aquatic chicken...
so if you are feeling down, because you aren't good at something you wish you were good at, then just remember, as my good friend Josiah Olsen once sang, "Ice cream, and waterfalls / peanut-butter in my pocket!"
"there's no place like ice cream and waterfalls!"