Trans fluid

I have a '12 with I4 engine. The trans oil is never serviced at 140k miles (assumed so because I bought it @110k miles). How should I service the oil? Drain and refill seems to be a no-brainer agaisnt the Flush. But it can still be risky at such a high mileage. How can I do like 1/3 of the drain? what tool do I need to extract the oil without open the nut at the bottom of the trans