أم من خلقنا refers to the other creation that has been mentioned previously in the surah:
The Heavens and the Earth and what they contain. This is also supported by the following ayat:
لخلق السماوات والأرض أكبر من خلق الناس ولكن أكثر الناس لا يعلمون
The creation of the heavens and earth is greater than the creation of mankind, but most of the people ...
First not that your question title is asking about 6 letters while the content only reveals 4!
The best way is to look for a hafidh who has a connected chain to the prophet and learn from him the so called makharij al-Huruf مخارج الحروف first.
See also Need proper pronunciation of various Arabic alphabets to read Quran correctly
IMHO ظ is the only ...
According to this fatwa on islamweb #48460 (in Arabic).
Your interpretation of the significant parts is simply wrong:
O Allah! We implore You for help and beg forgiveness of You and believe in You and rely on You and extol You and we are thankful to You and are not ungrateful to You and we alienate and forsake those who disobey You.
اللهم إنا نستعينك ...
To seek Allah's pleasure, as Dua is also a form of worship.
إن الدعاء هو العبادة ثم قرأ: وقال ربكم ادعوني أستجب لكم إن الذين يستكبرون عن عبادتي سيدخلون جهنم داخرين
Supplication is worship. Then he recited: And Your Lord said: Call upon me, I will respond to you. Verily, those who scorn My worship, they will surely enter Hell humiliated. (40:60)
From what I understand, the question is talking about equality in terms of difficulty of life or difficulty of Allah's test.
The answer to that is clearly no.
A simple evidence is that we are told to make the following dua:
[...] Lord, do not burden us as You burdened those before us. [...] (2:286)
And according to the Prophet (SAW), Allah accepted the ...
The Shia tafseer works can be classified into three or four groups two of them overlapping with the two classes in the question.
Tafseer ar-Riwa'ee, ma'thur, aw an-naqli (تفسیر الروایی، مأثور او النقلی, eng. Exegesis via narration, heritage or transmission) which relies on hadiths by the Prophet (ص) and the Imams of Shia (علیهم السلام).
Tafseer al-ijtihadi ...