Not exactly sure what you are missing.
If you are wanting "step by step" instructions for doing the oil change..........that might require a lot of searching and reading of archival material.
Basically this forum is made up of all kinds of people, some are professional mechanics, some are just clever DIY folks, some are neither.
Just remember, if you are wanting to "do it yourself" you are going to have to put yourself through some kind of educational process.
Click the link to go to the library.

Here is a link that might be useful: Search results for research and further searching