It will do whatever you intend it to do...?
Hmm. Confidence is a virtue eh

The thing about a circle is it's like the stick or straight line. Some cultures get to the centre of things with a circle, some with a line - both are very much alike.
For instance the honfour or ritual space in Vodoun is the post in the centre of an open-sided room, similar to brands of South American shamanism - spirits enter from below or above, they meet in the middle where you are.
With a circle every way you look at it, you're in the middle, yet it has no depth (like a straight line) - draw the symbol for the sun (also the centre of a Western natal chart) - imagine that's you in the middle; now if you look at it from above, below, left or right, it's still a perfect circle and you're still in the middle of it - centre of the universe.
Raising energy is questionable. Only you can raise the energy within that space, or call it into the space, or use it to step through the worlds. Tools are only toys if the master cannot wield them - and none of us can on a bad day

I doubt the spell faltered because you cast the circle wrong, I'm sure the circle was cast wrong because you faltered. Tiredness, mental drifts, the day before or ahead - everything can pull on your concentration and energy levels. Sleep well, eat well, try again.