i think for someone new to photography you have a great start,
you have done very well getting rid of and minimising the signage outside the church ( inconsiderate councils! lol) the halo has already been pointed out as has the leaning, always check your buildings for lean and CV's ( converging verticals) which CAN work in some images specially when shot with a very wide angle .but it doesnt here.
what bothers me most about this is the composition, and that is key to any good image no matter how good the processing.
the whole image leaves me feeling somehow cut off from the rest of the church, i dont mind so much that the steeple is central, BUT it would have been so much better if the whole church had been captured instead of a part of it,