aid. I need ...

hello.
I wanted to learn to do all possible maintenance to my car and thus save a little money.
-I suppose that the first thing would need a complete workshop manual
- some brico or tutorial of how to change the oil and step by step filters and the precautions to take into account.
- I don't know, tutorials step by step about everything you need to do all possible maintenance.

My car is a Citroen Xsara 1.9D year 99/00.

Please and thanks.