We do not believe in salvation through works or morality or baptism or promises to obey. We believe in salvation by grace and through trust in Jesus. We become Christians by trusting Jesus Christ as Savior. We believe in Jesus to give us life and a relationship with God that begins now and lasts for eternity. The way to God is by grace, through faith or trust. The Bible teaches this continually, especially in books such as John, Romans, Galatians, and Ephesians.
We do not become Christians by committing our lives to Christ, i.e. by promising to obey Him. We should do that. Every Christian should fully commit their entire lives and all that they are to Jesus. But we are saved by trusting a Savior who died for our sin and rose again. We transfer our trust from self (being good enough) to Jesus. Simply believe in Jesus. (See John 1:12, 3:15-16, 5:24, Romans 3:21-31, Ephesians 2:8-9)