Hi, Monica! You can also use the word "храм" [hrʌm] ʌ like in struggle) if you mean a building. Maybe it would be easier to pronounce. :) It is used mostly by believers, but still recognizable.

церковь pronounced as TSEHR-kahf'

I think the right spelling of 'Цервокь' will be like Tserkov'

Hi Monica, You can use 'Церковь' in both cases to call a building and to call an organization. I've got some difficult to spell Russian letter 'Ц' in English. So I hope you can recognize Russian letters.