Converting Wordpress template and fell at the first hurdle

Hi all,

First post and a newbie to blocs. I have been using wordpress for a while with page editors and these are fine but I find the websites to slow so I want to move my sites to blocs, but I am finding even the simplest things tricky.

Not sure if you can post URL’s but I am trying to recreate in blocks. Most of it I have figured out but I cant seem to get the positioning of the random blobs right and the images over the top.

I think I am going to have more issues with the Nav bar but I will save that for another time.

So to recap, I want my images behind the nav bar in the locations as seen on the old site with them appearing stacked.

Any help would be greatly appreciated.