Fireplace cleaning ?

Hi people! my question is not about roof cleaning. It’s relating to fireplace cleaning.  We recently bought an office space that had been previously furnished , which had an exotic fireplace attached . It’s been like 4 months and I’m worried how do we get it cleaned in future? We never had a custom fireplace in our apartment and I really don’t know how to go about cleaning them? Should I hire professionals ( if available )from the Stylish Fireplace - the fireplace dealers in Toronto ? Please share if there any online tutorial that I can take, for the same?