You've done a nice design job. But overall it looks much too busy.
I suggest to remove the shadows from the type, or make them very small.
To achieve a more professional look remove the Halo on the headphones.
This is a selfie of very poor quality, the eyes are blurred and out of focus.
The face looks like you tried to sharpen the details, but as a result you just increased the noise.
My advise is: Clean the lens of your smartphone and take another selfie with a shirt of your choice, possibly...
As a local artist I present my work regularly on Art Exhibitions in Zurich (Switzerland).
The current exhibition from April 25th to May 16th shows 18 pieces of my artwork, printed on canvas and framed in different sizes ranging from 90x60 cm up to 150x100 cm.
Each one is an original that I only...
I like your work!
I would call them 'Fantasy composites'.
Just one thought about the lighting. Always check carefully where the main light source is in your image.
All the different image parts you put together should have a similar lighting. Otherwise they'll never blend naturally.