Welcome to TAI

in shaa' Allaah we will all try to help you here.
As for converting to Islam, if you have not already, it is by uttering the testification of faith loud enough to hear yourself. To say, "I testify there is only 1 God, and I testify MuHammad is the Messenger of God."
If you are unable to pronounce the Arabic H in MuHammad, then you would substitute the name with Muhammad with the Prophet's other name he was known with: Abul Qaasim (the father of Qaasim). If unable to pronounce the Arabic Q in Qaasim, you would pronounce it as Abul Gaasim, like the g in glasses.
By uttering the testification of faith with the intention of entering Islam, while believing in it, the non-Muslim becomes Muslim - even if there were no witness.
After this, the Muslim is encouraged to learn about the basics of the belief of Muslims. And also how to pray. And other matters which follow this.
in shaa' Allaah here there are such articles.
Is it ok if you tell which country you are in?
I'm in Australia and would be happy to take you to lessons with me if you are in my city.
As for any past mistakes a person made, in Islam the person is not allowed to gossip about a person for sins that person has repented from. So eventhough a person might have committed fornication and even gotten children from that, if they truly repented that is forgiven. And it is known once an original non-Muslim enters Islam all their past sins are forgiven. The act of fornication is the wrong thing, but the children are not blamed. In shaa' Allaah by acquiring the Islamic obligatory knowledge you can strengthen yourself and protect your children.
in shaa' Allaah I will post links for you.
About the Hijaab, a woman needs to cover all the body except the face and hands in front of marriageable men. Personally, I have a lot of pants, long skirts, long sleeve tops, and scarves.
If you can't find any you can buy material.
It would really help if i knew where u were

Take care dear and please get back to us.