Creating a gallery

I have not used WP for more than ? year and have forgotten a lot.
I need to make new pages that works like the one in the link above.
Is there not someone who can help me how to do that?
I have installed Simplest Gallery and followed the instructions, but I do not get a chance to decide how the gallery shall look like.
Before I began using WP I read that it should be very easy to use. I think it is extremely difficult and complicated to use and besides it is extremely slow to use.

• This topic was modified 4 years, 3 months ago by graverholt.
• This topic was modified 4 years, 3 months ago by graverholt.

The page I need help with: [log in to see the link]