“If you believe with all your heart, you may” (Acts 8:37)

If you believed in Christ with all your heart, “by grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, lest anyone should boast. For we are His workmanship, created in Christ Jesus for good works, which God prepared beforehand that we should walk in them” (Ephesians 2:8-10). If “the Spirit Himself bears witness with your spirit that you’re a child of God (Romans 8:16),  you need to be baptized, regularly eat the Lord’s Supper, and participate in a church that believes and lives according to the dictates of the Word of God.
 
Baptism is the way to acknowledge what Christ has already done for you. “Shall we continue in sin that grace may abound? Certainly not! How shall we who died to sin live any longer in it? Or do you not know that as many of us as were baptized into Christ Jesus were baptized into His death? … knowing this, that our Old Man was crucified with Him, that the body of sin might be done away with, that we should no longer be slaves of sin. For he who has died has been freed from sin” (Romans 6:1-7).

The Lord’s Supper is the way to maintain intimacy with Christ. ‘Unless you eat the flesh of the Son of Man and drink His blood, you have no life in you.  Whoever eats My flesh and drinks My blood has eternal life, and I will raise him up at the last day ... He who eats My flesh and drinks My blood abides in Me, and I in him” (John 6:53-56).

Church participation is a primary means of grace for Christians. “Let us hold fast the confession of our hope without wavering, for He who promised is faithful. And let us consider one another in order to stir up love and good works, not forsaking the assembling of ourselves together, as is the manner of some, but exhorting one another, and so much the more as you see the Day approaching” (Hebrews 10:23-25).