The way you placed the render is bad considering the background you chose. There isn't any flow towards the render and the focal point is not very noticeable. Also you need to add depth by putting in a light source to the tag.
Read tutorials and learn how to do these kind of things, trust me, no-one will judge you by how many tutorials you read, tutorial or no tutorial it's still your work. However, try not to read whole tutorials and follow them exactly, read a few of them and take techniques from each of them and you'll be able to create your own style.
Keep practicing and you'll improve in no time.