Whiteboard installation

Our mental health organisation has a fairly large whiteboard that needs hung up in the whānau room - 2400mm x 1200mm, unfortunately none of us know how to use a drill, find a stud or whether something is centered or not. Further, in our leased office premises in Central Christchurch. In addition, we need a lightbulb replaced in a 3mtr high ceiling as we don't have a ladder on site.