Oil Questions for New Guy...

[Old School]

The last oil change on my GZ is unknown, but levels look good and the oil looks like it was just put in. Very good color. I'm not sure about the filter, it is a reddish brown. I was intending on putting new oil in it and picking up a filter. The question is this...how the heck do I get the oil out with the plug on the side of the engine...do I actually have to lay it down...dumb question I know but I am new to this. What is the best method for removing oil? What about the air filter? How often and what is the best method or where the heck is it so I can check it? Thanks from the guy who has not had time to read the online manual.