Welcome to Using English.
It's not immature, but it's a very basic question.
The past simple and the present perfect (I waited, I have waited, respectively) are certainly not the same.
Take a look at this resource: https://owl.english.purdue.edu/owl/resource/601/01/
You can also google the phrase tense simple past present perfect
and see if the other hits help you.
Student or Learner