Believe in Jesus Christ, (who is God Himself incarnated as a man), for one moment, who shed His blood and died on the cross for the forgiveness of all your sins (past, present, and future), was buried, and rose from the dead on the third day, according to the Scriptures, and you have eternal life and are saved forever: permanently, irrevocably, and irreversibly.
How do I know this? Look at John 3:14 and 15. (The verse right before the most famous verse in the Bible, John 3:16.) J
Jesus is telling the Old Testament story of Moses and the bronze serpent. (Numbers 21:4-9) The people bitten by the deadly snakes were told to simply look at the bronze snake, which was a type of Christ, and they were saved merely by that look.
Jesus did ~everything~ for our salvation.
You can believe in Jesus right now for eternal salvation.
The Bible says that our good works count for nothing in salvation, zero.