God looks at you and sees no outstanding debt of law on your account. The debt is fulfilled, paid in full—circumcision, Sabbath requirements, Festival requirements, etc.
The only debt of law that remains outstanding for the believer in God is the continuing debt to love others (Romans 13:8). Obviously, you can never keep that law one time for all time like Christ kept the laws of Sacrifice for sin one time for all time. The command to love others is a continuing obligation of law. The debt of law to lover others is fulfilled by us when we walk by the Spirit in our faith in God. Faith fulfills all the righteous requirements of the law of Moses. And so it is in that way that faith upholds all the law of Moses.
If you entangle yourself into Judaism, you are going to have to find some scriptures on how to be in two covenants and not violate one or the other.