Read the whole chapters of the referenced verses if you want a more complete picture. Salvation is simple, but other questions may not be.
What is salvation?
God created man, and then man decided to rebel against God. Salvation is the deal offered by God to forgive our transgressions against his law. Without salvation, we are dammed to burn and be tortured, with fire, in hell, for all eternity. The only way out is to appeal to God’s mercy is by believing on his only begotten son, Jesus Christ, to save you through grace.
But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death.
For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
Who is eligible?
Every person is eligible, except for the ones God has rejected permanently from his Kingdom because of their hatred for Him. (Jeremiah 6:28-30, Romans 1:28.) (Read all of Romans 1)
For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.
For the end of that scripture regarding the Jew and Greek, look the linked section of this article: Jews are going to hell (but they don’t have to)
Who is ineligible?
People who know God and hate him, and those who blaspheme the Holy Spirit. Blaspheming the Holy Spirit means to willfully despise and disobey God, and those people are judged by their fruits (what they produce). Romans 1 covers this very well.
31 Wherefore I say unto you, All manner of sin and blasphemy shall be forgiven unto men: but the blasphemy against the Holy Ghost shall not be forgiven unto men.
32 And whosoever speaketh a word against the Son of man, it shall be forgiven him: but whosoever speaketh against the Holy Ghost, it shall not be forgiven him, neither in this world, neither in the world to come.
What must I do to be saved?
The Bible is very clear what to do in order to be saved in Romans 10:9-10:
9 That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved.
10 For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.
You can say a little prayer (prayer not a bible quote):
“Lord Jesus, I believe you are the only begotten Son of God, and you were sent by God to be sacrificed for my sins, then rose again from the dead by the power of God, the Father. Please save me from my sins, that I may find grace and be forgiven, for I know that all men have fallen short of the glory of God. Amen.”
Baptism and other considerations
It is very important, but you do not have to be baptized in order to be saved from damnation. The very minimum is to be saved through faith. Remember, baptism is nothing if you do not believe, as water cannot save you, only faith can.
He that believeth and is baptized shall be saved; but he that believeth not shall be damned.
Your baptism must be by immersion. I am not one to ‘go back to the Greek’, as the King James Bible is perfect, but the meaning of words has changed. Letting the bible define itself, any time anything is ‘baptized’, it’s by dipping or immersion.
And Jesus, when he was baptized, went up straightway out of the water: and, lo, the heavens were opened unto him, and he saw the Spirit of God descending like a dove, and lighting upon him:
“Straightaway out of the water” is by immersion. Sprinkling and pouring are invalid, and if you were false-baptized in this fashion, it’s unbiblical, and you need to be properly baptized.
After Salvation and Baptism
You don’t have to do anything other than believe to be saved from hell.
Your goal as a Christian should be to obey the commandments of the Lord our God to the best of our ability.
He that hath my commandments, and keepeth them, he it is that loveth me: and he that loveth me shall be loved of my Father, and I will love him, and will manifest myself to him.
Listen to and read your King James Bible: study the Word of God. Find a pastor and fact-check every sermon, giving him the benefit of the doubt. If it seems wrong, ask him about it. If you were mistaken, humbly apologize and move on. If he is wrong and does not change his mind, he may be a wolf in sheeps’ clothing.
But he answered and said, It is written, Man shall not live by bread alone, but by every word that proceedeth out of the mouth of God.
Do not let men tell you what to believe, only believe what the Bible says. Know the Bible is truth.
Howbeit in vain do they worship me, teaching for doctrines the commandments of men.
Not giving heed to Jewish fables, and commandments of men, that turn from the truth.
Spread the Gospel, and get people saved.
Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:
And lastly, rebuke the wicked and correct your Brothers when they are wrong. It is NOT love to tolerate sin.
2 Timothy 3:16
All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: