Do you want to learn more about the Christian faith?
There are booklets called The First Step and Steppingstones to God that can guide you to understand the love of God and what he wants you to enjoy in your heart and life. The booklets were designed to be a correspondence course, where the study booklet is sent to you, and you can reply with your completed booklet (and any questions you have), and ask for more booklets to continue the study. You can contact the publisher for the booklets.
Below are brief descriptions of the two basic courses:
The First Step: This correspondence course from the Gospel of John answers these questions:
Was Christ really from God?
Is He divine?
Can He save man from his sins?
This course is for those who wish to learn more of Christ and His mission on earth even if they have little or no Bible knowledge. A copy of the Gospel of John is included with this course. 5 books (including the Gospel of John).
Steppingstones to God: Begins with a foundational knowledge of God, the Bible, and the fall of man. Presents the remedy for sin and the basic steps to salvation. Students are led on to assurance, victory, growth, and obedience. Concludes with a Biblical view of the church. 4 books.
Lamp and Light Publishers, from New Mexico, offers you and your friends free Bible studies on various subjects. (These courses are not recommended for preteens.) Those who would like to see what other correspondence courses Lamp and Light offers can visit a third-party website here: https://www.anabaptists.org/places/lnl.html . (Their group of Mennonites does not encourage much use of the Internet, so another individual has a page on his website for them.)
Again, you can request a copy of The First Step and/or Steppingstones to God from that webpage. These correspondence courses are free.