Will I be committing a sin if I teach Islamic knowledge to women in the mosque, even though I have not fully acquired Islamic knowledge, and what should I do to become qualified for that?

The virtue of teaching people good is immense. The Prophet, peace and blessings be upon him, said: "Indeed, Allah and His angels, and the inhabitants of the heavens and the earths, even the ant in its hole and even the fish, send blessings upon the one who teaches people good." And he, peace and blessings be upon him, also said: "Convey from me, even if it is a single verse."

It is incumbent upon anyone who calls people to a matter of religion to have clear insight into what they are calling to. It is not a condition that they be knowledgeable of the entirety of the religion; rather, it suffices that they be knowledgeable of the specific issue they are calling to. However, calling people while ignorant is not permissible, as it may lead to prohibiting what Allah has not prohibited, or enjoining what He has not enjoined, which is a serious matter. Allah Almighty says: "And do not say about what your tongues falsely describe, 'This is lawful and this is unlawful,' to invent a lie against Allah. Indeed, those who invent a lie against Allah will not succeed."

Therefore, it is advisable to continue seeking knowledge and conveying it to people, according to what one has learned from matters of creed or worship, and to seek assistance in this by utilizing the audio recordings and words of trustworthy scholars.