Romano headshot painting

I had never tried painting a close up portrait before so I thought I'd give it a go. I'm not really sure how this has turned out because I've been staring at it for so long. The proportions may be a little bit off?? The nose is a bit weird but a realistic one looked even worse.

Eh... well I can only get better with practise, right?

I'd welcome any constructive criticism or critiques to help me improve!