Exodus 15:13 Thou in thy mercy hast led forth the people which thou hast redeemed: Thou hast guided them in thy strength unto thy holy habitation.
It was God in His mercy that got His people out of slavery. It was God who redeemed them. It was God who guided them. It was God whose strength will take them to the place He has prepared for them.
He gets all the glory. He does it all. There is great security in a salvation that you know you didn’t do. If you had done anything to get saved it is very possible that you would undo it. But it was all God.
Give Him glory. Believe Him. Trust Him that saved you to keep you. Just give Him all the glory for all that He has done!