Rack the beer to keg, hit with 20 psi and purge air a few times. This is just to seal the keg and remove any oxygen. Then you can remove the CO2 until you're ready to start carbing. I wouldn't go the burst method for your first keg. There are too many stories of people doing it to "save time", but then fighting carb level for much longer than if they would have just use the set it and forget it method.
Not saying people haven't found the process to make burst carbing work for them, but for your first time I would save an extra headache or two.
Also, after you get it all sealed, Put some starsan solution into a spray bottle and spray both your posts, poppet seals and lid seal to check for leaks.