just be conscious of sin and ask for forgiveness is all that is required to have a relationship with God.
It should be noted that repentance is required more then just once.
Matthew 3:8
8 Bear fruit in keeping with repentance.
Acts 3:19
19 Repent therefore, and turn again, that your sins may be blotted out,
John 4:24
24 God is spirit, and his worshipers must worship in the Spirit and in truth.”
If we died with Him, we will also live with Him; if we persevere, we will also reign with Him. If we disown Him, He will also disown us; If we are faithless, He will remain faithful, for He cannot disown Himself.
2nd Timothy 2:11-13