Hey Steph
Thanks for joining the forum, nice to see more new faces coming along now. Feel free to share any of your songs or lyrics on the forum.
As far as having a poor instrument goes, sometimes it can make you a better player, because you can't rely on the quality of the instrument to compensate for lack of technique. I found this to be very true when I learned the guitar on an old and difficult acoustic. I know it can be frustrating, but challenge yourself to make a sound you like on your keyboard, and you'll end up surprising yourself.
Of course, playing an instrument isn't an absolute requirement. If you can sing, just write a tune for your song, and sing it.
Hope to see you around on the forum
Tone