من is a partitive article just like from but عن it is like about Examples انا اريد قميص من قمصانك I would like to take a shirt from your shirts انا لا اريد ان اتحدث عن هذا الموضوع I don't want to talk about this matter

عن ( حرف جر) about / from if you are saying this... حديث عن فلان.... that's mean has been taken from that person. (that person is the one who told the story. من (حرف جر) from Means that the story is being taken from a special book But in normal Arabic speaking they got another meaning as well For example let's talk about friendship لنتحدث عن الصداقة

Just from the meaning

وعليكم السلام، We say من =i came 'from' Algeria We say عن =iam talking 'about' you

In the Qur’an there is something called interchange of works between prepositions so it depends on the context of the Quranic verse.