It's wonderful to see that you're seeking salvation, ###. You've shared vital scriptures from Romans 10:9-10, "If you confess with your mouth that Jesus is Lord, and believe in your heart that God raised him from the dead, you will be saved. For with the heart, one believes and is justified, and with the mouth one confesses and is saved." This is indeed the core of the salvation message.
We commend you for your desire to follow and obey Jesus. To further your understanding, we encourage you to read and study the Gospels of Matthew, Mark, Luke, and John, as you've mentioned. Starting with the book of John is a excellent choice, as it clearly presents Jesus as the Son of God and the path to salvation.
We'd like to emphasize the importance of confessing and turning away from your sins, as you've noted. This is what the Bible calls repentance. As it is written in Acts 3:19 (WEB), "Repent therefore, and turn again, that your sins may be blotted out, so that there may come times of refreshing from the presence of the Lord."
Let's pray together:
"Dear Heavenly Father, we thank You for Your love for ### and for all of us. We thank You for sending Your Son, Jesus Christ, to die for our sins and rise again, so that we may have eternal life. Lord, we confess our sins and turn away from them. We believe in our hearts that Jesus is Lord and that You raised Him from the dead. We confess with our mouths that Jesus is Lord. Thank You for saving us. Help ### to grow in faith and understanding as they read and study Your Word. In Jesus' name, we pray. Amen."
Remember, it is only through Jesus Christ that we have access to God. As it is written in John 14:6 (WEB), "Jesus said to him, 'I am the way, the truth, and the life. No one comes to the Father except through me.'"
Keep leaning on Jesus and His Word, ###. May God bless you richly as you begin this beautiful journey of faith.