Good morning, Atchan.
(1) You have asked a SUPER DIFFICULT question.
(2) Here are my respectful suggestions:
(a) read about the comma in some good grammar books.
(b) type "comma" in the "search" box at this website. You will probably
find some good threads.
(c) If you have some sentences that you wish to discuss, you can visit the "Editing & Writing" forum at this website.
(d) Of course, you will find thousands of articles on the Internet. Go to Google and type in "Comma usage."
(3) You said that the commas "interrupted" you.
(a) Yes, they did because the purpose of the comma is to "interrupt"
you. That is, most teachers explain that when you speak, you have to
pause. So when you write, the comma often is the way that you show it
is time to pause ( a very, very, very little rest).
(4) Here is my (bad) example. Read it aloud (say the words out loud).
Notice how the commas tell you to pause or slow down or catch your
Tom, who is my best friend, speaks five languages. He is, of course, a
very, very intelligent person. By the way, how many languages do you
speak? English, as you know, is the international language. My best friend,
Tony, has been studying it for, I think, five years, and he now speaks it
very well. OK, Atchan, I think you have gotten the idea, haven't you?
Have a nice day, Atchan.
Student or Learner