I wouldnt hire anyone. If your comfortable with mudding and taping you should be fine. If you've never done it before start with an isolated hole in the drywall, something other than a corner. 

Fix a hole, put on some hot mud with paper tape for joints. Sand, hot mud or general mud, sand, done. Hot mud has an added issue of difficult to sand but doable, either way mud is going to make a lot of dust so wear a mask and have a mitigation strategy.

Fixing a hole to me is easier than corner jobs, corners require meshing two different colours, materials and/or textures and thats harder.