The best thing I can do for you is point you to the first gospel sermon ever preached. Surely the means of salvation was clearly laid out in this essential sermon. After preaching about the death, burial and resurrection of Jesus, and explaining that we, as sinners, are all responsible for the death of Jesus, Peter was asked by those who were cut to the heart by the gospel message (Acts 2:36-36) “Brothers, what shall we do?” I think that if you do exactly what Peter said, you will be good to go. Peter answered this: “Repent and be baptized in the name of Jesus Christ for the forgiveness of your sins and you will receive the gift of the Holy Spirit. This promise is for you and your children–for all who are far off–for all whom the Lord our God will call.”
Notice, this sermon does not mention “choosing Jesus.” In fact, the New Testament never mentions the phrase “choosing Jesus.” What is required of you, assuming that you have heard and believed the gospel message is that you repent of your sins and that you are baptized (which in Greek means be immersed) into Christ (Galatians 3:26-27), and you will be saved. The Bible never suggests that we should “ask for forgiveness.” This idea of being save by praying for forgiveness is an invention of the nineteenth century, and it is not mentioned in the Bible. I am sure God would not mind you asking for forgiveness of sins, but biblically this request is not the means of obtaining forgiveness. I hope you have a local church there where there is someone who can help you come to assurance of repentance, after which you should be baptized into Christ for the forgiveness of sins.