Don't worry about the pictures and your newbie account. If you want to write a review explaining a little bit about your setup, then go ahead. Make a new post, write what you want, upload the images to Imgur and place the links in your post where you would like to have those pictures visible. I will quote it for visibility, so the pictures can be seen on the forum.

Then when you rank up to Jr. Member, you can post images without restrictions. You can already place them in img quotes, and when you get promoted to a higher rank they will pop up.