[Ascovel]

First, like Lana says, don't worry about the graphics too much just yet. Building the game itself is the most challenging part, especially if it's your first (Is it?).

The window with the curtains looks good, the rest of the image desperately needs more detail, as well as a sense of why we are looking at that specific room corner. I mean, as a tech test it is totally ok, but it's a fairly typical render and before you add in there anything that defines the image's purpose, it's difficult to evaluate its quality.