the art is great and the website looks really nice but could use a few tweaks.
The space at the top is like air around your name/logo to let it breathe. I wouldn't add anything next to it, or at least I would make them much lighter and may be even smaller as not to compete with the main element.
I would use 1 of your horizontal illustrations in it's real size or in a size that matches the width of everything else. it will showcase your work and add a focal point to your home page
the social media icons need to be smaller in my opinion
make sure all paragraphs text is aligned at the left, or flush left. It will look more organized that way.
I tried something I hope it helps full width:
or center only
and make sure it looks good on cellphone.
if you want the website to work only as a portfolio then that's fine, if you want the website to get you traffic then you may want to look into writing blogs and read up on SEO.