You need to add you're content through the proper file structure in your Operating System rather than in DAZ|Studio.

Until you get used to things I would recomend using the default Runtime folder located in the Studio file. Do this...

1. Create a folder on your desktop naming it whatever you would like.
2. Extract the contents of the .zip files into the new folder.
3. Locate the "Content" folder on your computer. in Windows it will be here - 

C:Program FilesDAZStudiocontent

4. Copy the Runtime folder of your new files(from step 2) and paste them into C:Program FilesDAZStudiocontent.
5. You will get a notification from your OS asking you if it is okay to merge the contents with the existing Runtime folder.
6. Answer yes.
7. Open DAZ|Studio and your new content will be available.

I've been using D|S for a year now and this is stil the way I do it.

I took a look at the image in your gallery and I find it to be quite inventive for a newcomer. Looking forward to seeing more.