Refreshing knowledge about maintenance

Hello everyone, I would like to renew my knowledge about parts of maintenance. One forgets a lot if one does not do something for too long. 1. What should be taken into account when changing oil? I would first open the drain screw, let it “run out” first, then remove the oil filter and also let it run out. If everything is outside, use a new filter and new sealing rings for filters and drain screw and then after everything is available again, the max. amount of oil a fill the car and leave the car up for a quarter of an hour. (I don’t know why, but that’s how I did it last time. How much oil can I fill in the 2.0 L with 133 Ps automatic? 2. Because of the brake in the front it is clear: Do not cover a topic and simply push the caliper back with the special tool normally, like with a pipe tong (is that so?) But back? Do you have to turn back there? and you have to pay attention to the hand brake? 3. Can the automatic oil also be uncomplicated change rt (I’ve never done it myself) That’s what it should have been for now. I haven’t done it for a while and would rather ask before nothing works. Thank you very much for your help and a good evening.