Could you please tell a dua or a verse that can be recited to better ones akhlaq?

Dua makaram al akhlaq

I'm getting addicted to looking at na mehram explicit images of women. I don't know how I can stop it. It’s become a habit now. I've tried hard but whenever I'm alone or sat because of any reason I just browse such things. I know this has to be stopped. It has affected my academics, ability to concentrate on my studies. I've had problems like stress, incontinence of urine so whenever I go to micturate. I eventually have to take a bath. This has affected my prayers specifically during college hours so I don't offer prayers 5 times a day. Please help me. I was diagnosed with depression previously as well so all this together has been difficult to handle.

Firstly seek Allah’s help and forgiveness. Send Salam to the 12th Imam (aj) and ask for his help.

One suggestion is that you could make a nazr (vow) to Allah that if you fell into that haram action then you would do something to compensate. You could specify that as something difficult that would deter you from that action. Perhaps like fasting 3 days or paying $50 charity, etc.

If Islam is a complete religion, why did it not reach to everyone with the same vigour. The Non-Arabs during Prophet's time, the people living in forests, the nomads who are born and die without getting to hear Prophet Muhammad(pbuh)'s name and yet they are in his Ummah. Why did the Nubuwat not reach them and how exactly will they be reckoned on the Day of Judgement?

If they did not know of Islam nor had the ability to find it then they would be considered Mustad’af. They will be tested in the next life before being judged.

Can you give me a dua that will be accepted fully

We have many recommended supplications, but if they will be accepted from the reciter or not is known to Allah. We should seek forgiveness and be sincere in our supplications hoping for Allah to accept them.

I am going through two problems which are extraordinary and not normal for any one to face. Please help me grant an audience with the Imam atfs or at least tell me a dua which can be answered guaranteed.

No one is in direct contact with the Imam (aj) and no one can guarantee a dua being answered. If a dua is answered or not depends on many conditions. You should strive to recite Dua Tawassul every Tuesday evening.

Also this dua

Eleventh: Shaykh Kaf`ami in his book al-Balad al-Amin has written, "This is the du`a of Imam Mahdi (`a) that he taught a person who was imprisoned. He was released, thanks to reciting this du`a.
إِلَهِي عَظُمَ الْبَلاَءُ وَ بَرِحَ الْخَفَاءُ وَ انْكَشَفَ الْغِطَاءُ وَ انْقَطَعَ الرَّجَاءُ وَ ضَاقَتِ الْأَرْضُ وَ مُنِعَتِ السَّمَاءُ
My Allaah, irretrievable is our plight, our helplessness causes pain and trouble, (now our) urgency has been laid bare (before Thee), (all) hopes have been cut off, the (plentiful) earth has shrunk (with very little to spare) for us, the heavenly blessings have been withheld,
وَ أَنْتَ الْمُسْتَعَانُ وَ إِلَيْكَ الْمُشْتَكَى وَ عَلَيْكَ الْمُعَوَّلُ فِي الشِّدَّةِ وَ الرَّخَاءِ
we call upon Thee for help, we refer our grief and sorrow to Thee, we have full faith in Thee, in the time of distress as well as in good fortune.
اللَّهُمَّ صَلِّ عَلَى مُحَمَّدٍ وَ آلِ مُحَمَّدٍ أُولِي الْأَمْرِ الَّذِينَ فَرَضْتَ عَلَيْنَا طَاعَتَهُمْ وَ عَرَّفْتَنَا بِذَلِكَ مَنْزِلَتَهُمْ
O Allaah, send blessings on Muhammad and on the children of Muhammad , the "Ulil Amr" (authority), obedience to whom has been made obligatory, through which their high status has been made known.
فَفَرِّجْ عَنَّا بِحَقِّهِمْ فَرَجاً عَاجِلاً قَرِيباً كَلَمْحِ الْبَصَرِ أَوْ هُوَ أَقْرَبُ
Therefore let there be joy after sorrow for us for their sake, right away, in the twinkle of an eye, more rapidly.
يَا مُحَمَّدُ يَا عَلِيُّ يَا عَلِيُّ يَا مُحَمَّدُ اكْفِيَانِي فَإِنَّكُمَا كَافِيَانِ وَ انْصُرَانِي فَإِنَّكُمَا نَاصِرَانِ
O Muhammad, O AIi, O Ali, O Muhammad, Give me enough, because both of you provide sufficiently, and help me, because both of you help and protect.
يَا مَوْلاَنَا يَا صَاحِبَ الزَّمَانِ الْغَوْثَ الْغَوْثَ الْغَوْثَ أَدْرِكْنِي أَدْرِكْنِي أَدْرِكْنِي
O Our Master, O the Authority of our times (Saahibaz Zamaan), Help! Help! Help! Come to my help! Come to my help! Come to my help!
السَّاعَةَ السَّاعَةَ السَّاعَةَ الْعَجَلَ الْعَجَلَ الْعَجَلَ يَا أَرْحَمَ الرَّاحِمِينَ بِحَقِّ مُحَمَّدٍ وَ آلِهِ الطَّاهِرِينَ
in this hour, in this hour, in this hour! Be quick, Be quick, Be quick! O the most Merciful, For the sake of Muhammad and his pure progeny.

Apart from history books of Sunni Islam, is there any reference of the attack on the house of Fatima in any Sunni Hadith book. Not history books like tabari, ibn athir, ibn kathir

https://www.amazon.com/Tragedy-Fatima-Daughter-Prophet-Muhammad/dp/1501012797

Can we pray on blank paper like the copy paper to do sujood on if we don’t have turba or something else available at work?

Yes

What is the correct way to say Salam?
1. As Salam alaykum
2. Salamun alaykum

As-salaamu ‘alaykum

What hadiths do Shias follow or believe in?

We have four canonical books of ahadith

https://en.wikipedia.org/wiki/The_Four_Books

I wanted to know if it is permissible for women to recite nauhas, qasidas, etc in a majlis when there are men in the next room listening. Also, if the person organising the majlis is someone’s relative, is it necessary to attend such a majlis?

Women should not recite for non mahram men. You’re not obligated to attend any events even if they are your relatives