That’s quite an order!
Salvation history is the story that the bible tells. History indeed telling the thread of history that traces how we can be saved.
Mankind lost communion with God in our first parents, Adam and Eve. God had made a covenant with them. He adopted them. Not just a creator, but a father.
They decided that they wanted to make the decisions and become “like God” without doing it God’s way. God allowed them to move away from him and he no longer allowed them in his presence. They “fell.”
Now they need to be “saved”.
The continuing story of salvation history deals with how God reaches out to them and renews the covenant of adoption with his people, and how they break the covenant and worship other gods.
During that time, there was the concept of sacrificing. Cain and Abel sacrificed to the Lord. Melchizidek offered bread and wine as a sacrifice for Abraham. Passover was a special one that was a meal and a covenant renewal which included special food: a lamb. The lamb was killed and eaten, its blood marking the house to be spared from death. During the Exodus, God instituted ritual sacrifices.
All these ritual sacrifices were to help the people learn that they have sinned and sin breaks the covenant with God. They were meant to re-connect them with God.
Eventually God sent his only begotten Son Jesus into the world to show 1) how to live without sin and 2) to how to love in a completely self-giving way. This led to his death. Before He died, Jesus placed HIMSELF in the context of the lamb in the Passover meal. He re-covenanted with God in his own body and blood, using bread and wine like Melchizedek. He offered it to his disciples to partake in the covenant and asked them to repeat the ritual in order to allow all to partake in the covenant.
Jesus died and was resurrected in order to show his sacrifice was acceptable to God.
To be saved, you need to believe Jesus’ words when he said in the 6th chapter of John. “…whoever eats this bread will live forever; and the bread that I will give is my flesh for the life of the world” and again “unless you eat the flesh of the Son of Man and drink his blood, you do not have life within you” and the topper: “Whoever eats my flesh and drinks my blood has eternal life, and I will raise him on the last day”
There is frequently a misunderstanding between some who say “Faith alone” and Catholics who say instead, “Faith, Hope and Love” I believe that the former pack all 3 virtues into the word Faith when THEY say it.
What I mean by this is, if you have faith, that is step 1. The next step is to trust it, Hope. The next step is to act on that trust, Love/Charity. The works that you do, when born of those three virtues, are God’s work. They transform you slowly until you resemble Christ. If you eat his body in the Eucharist, you receive Grace, which is a share in God’s own LIFE! This gives us the power to choose to become more like Jesus in HIS power, not ours. Instead of digesting Him, we ourselves are digested and we become part of the Body of Christ (the Church!).
So yes, believe in Jesus, but specifically believe him when he tells you how to live forever.
This is salvation.