@Valka26, assuming you are playing on a PC or Mac, to get into the Gallery you need to enter your game and click on the button in the top right corner that looks like an icon of a photograph (It says "Open the Gallery"), or you can press the F4 button on your keyboard. From there, you will see options to for news, your library, etc. that are listed in tabs at the top of the box => you need to press the tab with the icon of a little cloud that says "Gallery". If you aren't connected to the internet, you might be asked if you want to do so, so choose to be connected. 😉 You are now in the Gallery! 😎 To see or use anything you download from the gallery, or anything you upload to the Gallery, you need to click on the right hand tab that says "My Library".
If you have any more questions, please feel free to ask! 🥳