practicing??! my goodnes gracious, i do believe you've got it.
OUTSTANDING photo. it is very hard to shoot a sunset and not be boring- seems to be one of the most photographed phenomena. yours is unlike most because it is interesting and shows great dof. the bright light hugging the left horizon and the lines of the clouds to the right both add spice.
one suggestion, and please feel free to ignore it, but you might want to try to bring the left crop line in to bisect the two left-most trees in the midground. if any of the branches in upper left still exhist, clone sky over them.
i tell you something, i would be damn proud to have taken this photo.
well done.