is removing mold from bathroom ceiling a job i can do myself?

if it's surface spots over a small area, yes. the usual guideline is under about 10 square feet is a DIY job. gloves, goggles and a proper mask, window open. scrub it with detergent and water or a mould spray, let the ceiling dry completely, then repaint with a bathroom or mould-resistant paint. painting straight over it just hides it for a few months. it'll come back unless you fix the steam, so run the extractor fan during showers and for a good 20 minutes after. if the plasterboard is soft or stained from above, that's a leak, not condensation, and a different job.