Thanks for sharing your progress on a project with us. As far as other platforms, I know that quite a few Unreal artists use ArtStation to share their work. However, sharing here on the forums is always appreciated since we get to go through entire threads of the development process. 
Also - Great work on the Adventure environment so far. The lighting and assets used give a really high quality feeling. Can’t wait to see what the final product looks like! In the meantime, happy developing! 