mastiffhound

Hello everyone I'm new to Audi cars, my first is a 2007 A4 2.0T Quattro. It has 57,000 and is in very good to great condition and I paid $10,500, was it a good price? I also have a question and have no idea what part of the forum to post it in so here I go.

The oil change? I picked up some Mobil 0W-40(it met the specs for Audi and I seen others that recommend it on this forum) and the K&N oil filter. My question is concerning the canister. Do I have to drain it out of the valve or can I just unscrew the canister (I know it might be more messy this way, but it seems easier) and drain it that way because playing with plastic valves makes me nervous. I actually have a Husqvarna lawn tractor that had a plastic drain valve that leaked all the time until I replaced it with a steel plug. Any other concerns or problems I should look out for?

Any insight would be appreciated and thank you for your time and the help in advance!