Yes, drain from plug area and refill in the dipstick hole. Do not mess witht the lines. Also, once you refill the transmission with new fluid. Crank up the engine and move the transmission selector through R N D 2 and back to P. Not exactly sure why you need to do with this. I think it enables the torque converter to be fully lubricated or something along those lines.
Good point - always a good idea to run the transaxle through the gears, apply the brake, shift through the gears, one at a time, pausing briefly in each gear for a couple of seconds. This is to pump fresh fluid through all the oil passages - some recommend doing this before a drain and refill as well, but I haven't personally done that.
Depending on the driving conditions - might have to drop the pan and clean the magnets and replace the metal "filter". Some cars generate more shavings and deposits than others, some are surprising dirty in 15K miles of driving, others can go twice that distance and be fairly clean - all depends on the driving conditions. Personally, I do a drain and refill every 30K miles, with a pan drop every other drain/refill. But I also tow a small trailer, on occasion, and I see a fair amount of stop and go traffic every day.