Cleaning out a chimney is pretty simple. I do it a couple times a year. Just buy the right sized brush and enough sections to reach from the top of your chimney to your wood stove.
Just be careful on the roof. Last winter I fell off my roof. But with over 6 feet of snow on the ground I didn't have too far to fall.
Cor Blimey govnor thats the hard way, Just get yourself an orphan brat about 8 year old and send him up the chimney wif a brush