Hmmmm….. The simple past is common for conversation, and the past perfect is more often used when the action is complete and did not take a long time. Also used more formally.
The simple past: I did this, we did that, then we did other things, and then we..... etc.
The past perfect: I have done this, I have completed this and then we have gone out …
I'm sorry: I don't know much grammar of my language.