Stop the arguing.
As for the piece I would say it needs a better color scheme. Right now it looks like a mess and is really hard to tell whats going on. I would suggest starting originally with colors that actually match nicely or work well together OR work with gradient maps and other adjustment layers that can toggle the color attributes.
For now that's all I'm going to say because that's your biggest problem. As for other small things I would suggest making the canvas a bit smaller especially if this is a signature. Not bad for getting started (i think) I remember when I first got photoshop and basically used like every filter and effect in one piece lmao.