Thank you for your question. There is no problem with breaking your fast after the magrib prayers. In fact, in a tradition from Imam al-Sadiq (as) it is preferable to pray before breaking the fast.

May you always be successful.

Quran 49:10

“The believers are but brothers, so make settlement between your brothers. And fear Allah that you may receive mercy.”

The first step is to seek Allah’s forgiveness. Then one should make a determination not to do that action again. 

If the sin is between him and people depending on the situation he may need to settle that with the person also as if he took some property from another for example. 

Some sins require some extra actions such as kaffara like in the case of breaking ones obligatory fasting intentionaly for example. 

The four Imams of the Mukhalifeen were fallible and self appointed by them whereas the 12 Imams of the Prophets family (as) were divinely appointed and infallible guides. 

Part of the hijab of man is to lower his gaze

If someone attacks you it is permissible to defend yourself. 

We all come together from different ethnicities and stand together to worship Allah together reciting the prayers in the same language. We stand beside eachother and move as one unit in prayer unified. 

According to some reports the Prophet practiced wrestling and some of his companions. This, of course, as a private training and not in the form of show or competition as we see commonly nowadays.

With prayers for your success.

Salamun alaykum

Peoples' rank may be elevated in Barzakh, however, not due to any voluntary act they perform there since the book for their actions is closed. It may be elevated because of some good work that they have left behind and the effects of it reaches them after their death, or due to charities or acts done on their behalf by their friends or relatives. There may also be other causes like breezes of mercy coming from the Lord every now and then. 

Salamun alaykum

The occasion of revelation is recorded only for some verses of the Quran not for all of them. You can find them in any book of tafsir like Majma' al-Bayan or Al-Mizan. It should be noted that not all those reports are reliable and sometimes they contradict each other or even contradict the Quran. Hence, one should be careful about the source from which these reports are taken.