Yes, park on a flat surface, drain the old gear oil, replace the plug, pull the dipstick, put in new gear oil, check level, done.
The clutch fluid does require periodic maintenance, see the manual. It's a matter of drainng and bleeding the system after replacement etc.
The gear oil will tend to look low on many cars, I'm unsure why. I've had the dealer check repeatedly and always get an OK answer despite the level looking on the low side to me, so I dismissed it.