You could always just upload the same pictures to your website that you're putting on Insta, but that requires double the work and is not so easy to do from your mobile device. You can also take the embed code off Instagram, then drop it into the HTML on your web page and do a bit of CSS formatting.
But the easiest way is to use a feed, so every time you add a pic to Instagram it automatically shows up on your site.
It's too much detail to go into here, but you or your webmaster can read about the nuts and bolts on Follows.com. There are also various widgets available, depending upon the platform your website uses.
Artists need to be sophisticated about social media these days and keeping your site up to date with your latest instagram posts is important publicity for your art.