Salvation is a free gift from God, called his Grace, it is for all humanity. To partake of this reality, one needs to be Born Again of the Water and the Holy Spirit. The water is the Blood of Jesus that covers us like a garment and God recognizes you as a partaker of his Kingdom. The Holy Spirit lives in you and takes you where God wants you to go.
Jhn 3:3 Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God.
Jhn 3:5 Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God.
This is your guarantee, regardless of what you do after, its Gods work that saved you not your work.