The existing drupal site needs a image gallery.
Image gallery should be similar than this gallery: http://www.gallerianapa.fi
It is important, that it is similar. You can check the details from this examble gallery, when you developing our image gallery.
Image gallery of the content management needs to be easy, as is usually the Drupal content management.
You can install our web page to your own development environment, where you can developing the picture gallery.
We will pay the first installment payment, the maturity of the project is about 50%. Then we can be convinced of your skills.