All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
We ask Allaah to reward you generously for your keenness to seek beneficial knowledge and investigate the reliability of the sources and scholars from which you learn your religion; this is both commendable and desirable.
Muhammad ibn Seereen who was one of the great Taabi‘is (successors of the Prophet's Companions) said, “This knowledge is religion; so, be careful about the person from whom you learn your religion.”
Imaam Maalik said, “This knowledge is religion; so, scrutinize those from whom you learn your religion. I have met within these pillars - and he pointed to Al-Masjid An-Nabawi - seventy people who said, ‘The Messenger of Allaah said such and such..’ and I did not take anything from them. Had any of them been entrusted with public treasury, they would have proved trustworthy, but they were not worthy to undertake this business (i.e. narrating Hadeeth). Then when Muhammad ibn Shihaab Az-Zuhri arrived, we crowded at his door though he was a young man...”.
This indicates that one should learn knowledge from trustworthy scholars who are devoted to knowledge and do not only pretend to be. They should be pious and knowledgeable, from the followers of Sunnah, not followers of religious innovations as following the latter would bring about corruption of the heart and the poisoning of the mind. One of the righteous predecessors used to say, “It is from the grace of Allaah that He blesses a young man with a mentor from the devoted adherents of the Sunnah.”
However, a scholar is not infallible. He may commit an error, and not every error entails having an aversion to him, and not all errors are the same in terms of gravity. The errors related to ‘Aqeedah (creed) are not like those related to other subsidiary matters.
We are not able to pass judgment about the scholars or the Islamic literature available in your country. However, if the scholars or entities distributing those books are trustworthy, then in principle, you may benefit from them. If you harbor doubts about any matter, you can consult other reliable entities to verify the doubted information.
The website you referred to includes translations of much of the accepted Sunnah literature, such as Saheeh Muslim, Saheeh Al-Bukhari and the Hadeeth literature of Abu Daawood, An-Nasaa'i, At-Tirmithi, and Ibn Maajah and the like. However, we can not determine whether the translation is good or not because this requires examination of all those books.
For more information please, refer to Fatwa 21750 and 82688.
Allaah Knows best.