Is trust in Christ all that's needed to be saved? Is mental assent and agreement to what you've deduced from hearing the gospel enough to be saved? Most denominations would give a hearty "Amen!" Just trust in Christ, they proclaim, and you're in God's grace.
Salvation is not as easy as going through a drive-through window. It’s not "praying the Sinner’s Prayer" (a recipe found nowhere in scripture) and ‘abracadabra,’ you're saved.
Trust (faith) in Christ is the first step toward salvation. Repentance is part of the process—changing direction. (Luke 13:3; Acts 2:38; 17:30) Confession of your faith is mentioned. (Matt 10:32; Rom 10:9) Baptism is the final step, where you submit your body for burial in water. (Acts 2:38; Rom 6:1-4; Gal. 2:20; 1 Pet 3:21)