Other people's experience may not match mine, but I found a drywall lift is cheaper than a drywall guy, and it gives you a lot of confidence since now you can have something hold the panels up without the muscle tension, for as long as you need (to chase a box of screws or whatever always seems to happen when you get a panel in the air). Makes one person ceilings almost relaxing. They have a tilt head so you can do sloped ceilings too. I got the HF one, works fine.
A crown stapler works well for metal corner bead, assuming that's what you like (some prefer the plastic or the stuff built into paper tape).
My drywall fit-up skills aren't the best, so I had a lot of gaps, especially where new met old. If that sounds familiar, look up "hot mud". It is a powder you mix up into compound in small batches, just enough to fill your "mud pan" to a usable amount. It starts to set in the amount of time in the name. So "easy sand 45" sets up (or at least gets unworkable an more) in 45 minutes (there are other brands too, like "fast patch", but I haven't used them). That's about right time to put up half a pan full with fiberglass tape with a 4" trowel. The joy of this stuff is it hardens in place without shrinking, even in big gaps and thick layers for quick build-up. Come back over it with a steel trowel the next day to knock off the high spots rather than sand. Then grab a bucket of regular old drywall mud ("green lid"?) and your next bigger size trowel and finish in thin coats like normal.
It's easy to spend forever going back over it, so at some point tell yourself "good enough" and stop. Paint the ceiling with a very flat ceiling paint to hide the rest.
