I get frustrated when I go to a website address and find "under construction" in large type on the home page or multiple parts. Really, a website should always be under construction. A website should be a living, breathing part of your business.
I hear a lot of artists wanting to make the perfect site (like, "oh, I'm waiting to put up a website until I finish this body of work," etc), but you should start now. Make a website that is reasonable for you. If it is just a template website or blog, fine. Just be sure it has up-to-date information and quality images. Know you can always add more pages and refine the structure.
Consider how you will us your site. It is a tool. I saw a mot the other day, "Build small businesses not websites ."