I find myself to be a Skeptic person means who doubt even the simplest thing in religion of Islam, for example the hadith, the authenticity of the books, fundamental beliefs and more
And I have passion to strengthen my belief by seeking knowledge
But it seems being skeptic affect me in any ways when gaining knowledge. In Islamic Perspective, how to stop doubting everything and be certain anyway?

The best way get be satisfied with any Hadith or materials that tells us about the Islamic faith or ideology is the Holy Quran so if you have doubt about any Hadith or sayings or traditions commonly practiced in Islam compare it with Quran if it’s against the principal of Quran then it would not be true.

But let me tell you one thin,g as far as Hadith are concerned, it’s true there are many traditions we have in famous Islamic Hadith books that are fabricated and Israelite ( at the time of Caliphate specially at the time of 2 and 3 caliph and during the Kingship of Muawia many Jews they accepted Islam just for their own benefits and started mixing many customs and cultures of their religion in Islam by the name of Hadith). One of famous example of their work is the famous book which was written by Salman Rushdi named “Satanic Verse” all the material he used in this books most of they are found in our Islamic books written at the time of Banu Umaiyyah and Banu Abbas. This is unfortunate very common and frequent practice of all emperor and King’s and even today in modern system of governance that these rulers fabricate many things by hiring few so called Scholars to fool the people and rule according to their own wish. Like when in early 19th century Son of Saud (Ale Saud) came in power they used the ideology of Ibn Taimiyah and the man who implemented them was Abdul Wahhab then the Saudi Government came in power with the help of British support and they spread Salafist ideology up many decades and now we can see their results in the shape of Al Qaida, Taleban and ISIS. I’m not saying all this because I’m shia. Anyone can go and find all these literature and thoughts on internet.
Therefore there are many Hadith we have in Islamic books as the fabricated one.
But despite all these there are many many Hadith we have that are Authentic and have complete chain of narration and both Sunni and Shia historians and scholars and Jurists have approved them and not only they approved them but even many Quranic verse support them too. For example when Christians of Najran were not accepting the Prophesy of Holy Prophet (saww) Ayah of Quran revealed and Allah (swt) commanded to Holy Prophet that now no need to have debate with them because we always do debate with those who accept logic. So now you do Mubahela with them. In that you curse on those who is saying lies and then Allah will punish liars. Christians of Najran denied of doing Mubahela and surrendered themselves.
Verse of Mubahela;

فَمَنْ حَاجَّكَ فِيهِ مِن بَعْدِ مَا جَاءَكَ مِنَ الْعِلْمِ فَقُلْ تَعَالَوْا نَدْعُ أَبْنَاءَنَا وَأَبْنَاءَكُمْ وَنِسَاءَنَا وَنِسَاءَكُمْ وَأَنفُسَنَا وَأَنفُسَكُمْ ثُمَّ نَبْتَهِلْ فَنَجْعَل لَّعْنَتَ اللَّهِ عَلَى الْكَاذِبِينَ

But whoever disputes with you in this matter after what has come to you of knowledge, then say: Come let us call our sons and your sons and our women and your women and our near people and your near people, then let us be earnest in prayer, and pray for the curse of Allah on the liars.(3:61)
Now why I’ve told all this big story that you may research that for Mubahela whom did Prophet (saww) brought with him against Christians of Najran.
His Alhlulbait ( Him solo Holy Prophet, Imam Ali, Lady Fatiam, Imam Hasan and Imam Husain )
This Hadith you can find in both Shia or Sunni Books.