I think it's the skin tone around the eyes that is off, maybe add some blemishes in the colour like the odd freckle or spot. Also the lips should maybe a different colour, and a bit of the background is still showing.
Otherwise, very good job, especially for a first go. And again, keep it up!
Lol , there's always one isn't there? Err.. thanks for your interest.
Thanks for the crits I totally forgot to make a selection to change the lips.
Unfortunately I flattened the image (something I've learned not to do recently), so I'm gonna leave this and move onto something else to practice on.