We can't save ourselves from sin, if we could then Jesus didn't need to shed His blood on the cross. But He did, because we can't. He paid the penalty for us as a gift to us.
The day I heard the gospel, and fully believed and accepted that free gift from God, is a day I have never forgotten. All the burden of sin and guilt, washed away. And a joy just flooded over me. All is well between me and God. There is peace with God. And I didn't work for it in any way. I am at peace. We non-rc's want this peace for you too. Please believe us. It isn't initial either... we have experienced a permanent peace and joy.
I never have to wonder if I still have a tomorrow, or if I'm still right with God when I die. I don't wonder. For I know in my heart, that all is well between me and God. God is so wonderful and awesome! Wow, what a change there has been in my life after that day! I have a joy and peace in my heart that has no boundaries.
It is so wonderful to be declared by God, "not guilty". You have nothing to lose by fully trusting God to save you. And everything to gain by it. God is powerful enough to do it for you.