Use simple past instead of present perfect or even past perfect when I'm talking

English as a Second Language English Vocabulary, Grammar and Idioms
1

Hello,
I want to know when I have to use simple past instead of present perfect or even past perfect when I’m talking.This is a serious issue for me.

2

Yo could Google it. This page explains the difference in a concise manner:
web2.uvcs.uvic.ca/elc/StudyZone/ … pvpast.htm

This one also has exercises:
ego4u.com/en/cram-up/grammar/simpas-preper

3

Difference between Simple past and Present perfect

Present perfect vs. simple past