Hi Beth,
If you upload some of your stuff, we could get a better idea as to your options.
Can you write good lyrics? If so that's a start, a songwriter could use them as a basis for creating a song.
Do you play any instruments? If not, then get yourself a guitar and practice, practice, practice. I started teaching myself guitar when I was 16 and within a few months, I was starting to put together my own songs. You are young and learning an instrument will come very easy to you. Then listen to female guitarists, watch them on YouTube and see how they do it, learn some of their songs and then play around with those chords and melodies or make up your own melodies to go over your favourite songs. The more time you put in, the faster you will be able to write your own stuff. Don't worry about writing a masterpiece straight away, just play around with it.
If you don't want to play an instrument, If I am going to be honest, your future depends how good you are as a singer. If you have a brilliant and fairly unique voice as well as a good character and presence, you will find it a lot easier to find a songwriter who you could possibly collaborate with. I could be interested but like most others, I only want to write songs for someone who can get me a financial return in my invested time and efforts and someone who can really add something to my songs so together we can make hits. There are a lot of people out there who want to be professional singers but not many actualy have the talent or enthusiasm. Hopefully you do, and the fact you have already invested time in recording suggests that you are serious, even at a young age which is good.
What is your musical style? Which bands/performers do you enjoy?