Are we under the Law, or under Grace? If the Law, then you must observe all 613 of the laws given to the Jews from the Lord, and if you mess up on ONE, even once, you end up a sinner, and bound to hell. And a lot of those laws are simply impossible to keep today, even if you live IN Jerusalem, as there is no longer a Temple for you to make sacrifice. Hence, your sacrifices made in the synagogues are worthless, and you end up a sinner and bound to hell.
However, we live by GRACE, and not by Law, as it says in in Romans 1:17 “For therein is the righteousness of God revealed from faith to faith: as it is written, The just shall live by faith.”
“And he said unto me, My grace is sufficient for thee: for my strength is made perfect in weakness. Most gladly therefore will I rather glory in my infirmities, that the power of Christ may rest upon me.” 2Cor 12:9
“For by grace are ye saved through faith; and that not of yourselves: it is the gift of God:” Eph 2:8
Now, you have before you a choice. Accept God's love, given to you by GRACE, manifest in the life, death, and resurrection of our Lord, God and Savior Jesus Christ, or attempt to keep the LAW, and die in your sins. Which do you choose?
BTW, The Old Testament LAW was given only to the Jews, and it was not for Gentiles.