There is only one true God - the Triune God - who exists in three separate but equal persons: Father, Son, and Holy Spirit.
There is absolutely nothing we can do to "be saved" - Jesus Christ has already done everything necessary.
It is through faith in Jesus that we receive the forgiveness of sins and eternal life.
Christ paid the debt and we receive forgiveness and eternal life from Him. He offered Himself out of unconditional love. That is why it is called grace – because it is truly undeserved.
Since there is nothing we can ever do to earn salvation, we do not do good works in order to be saved; good works are done out of praise and thanks because we are saved and for the benefit of others.