Sorry, I don't have a tutorial for this. Or at least not yet It was really a process of going into Photoshop and keep throwing things at the canvas until it looks good I hope you can find some use for this piece in your own work!
First of all, thanks so much for sharing this great starfield, it's a excellent work, as always. I have made this image ([link]) with your background. I hope you like it. Thanks again, and have a great day! Joy!