Sun and Moon - Seven of Pentacles

The girl seems to be drawing a circle in the sand. It makes me think that she is putting up boundaries. Since she is drawing the circle farther away from her than the circles already carved into the sand, she is creating bigger boundaries or limits arounnd herself. Trying to keep things away from her.

Since I'm new to tarot, I'm leaning on the key word a lot . So I try to associate failure with this image. Perhaps she's holding on to her fear or she's afraid of failure itself. I'm going with a more possible note that she's evaluating the process (drawing strategy on sand like in battlefields? --> too much movies for me ).
Or perhaps, she fails to see that all her gains are not stable (made of sands, easily to be destroy). She's too focus on drawing more sand circles and forget to look up or look around or think outside the box to make them stronger or more solid. Does it make sense?