First LVL Desing On Unreal Engine 4

Hello everybody. I've been studying Ue4 for only a month and decided to try to make the first render in it. There are a lot of disadvantages here, starting with the attitude of light to textures and ending with the concept. I didn't sketch, didn't use primitives at the beginning of work, which I really regret. I made the candles glow using a YouTube tutorial. So I'm not proud of it. I took all the assets from Quixel Brige. I ask you to write important problems, if you can, then tell me how you can fix / replace. Thanks.
Work: https://www.artstation.com/artwork/5B8gEE (unfortunately I can not add a video here, as the first time on this platform)