Our duty to God.
First of all you must know that it is by grace you have beeen saved. It is not because of your good works etc. But if you count yourself religious and still rely on the laws to be forgiven and saved, than yes, you must read them and understand and keep.
But anyway I want to say!
Before you start read, know that the Law was given only to show people that they are sinful and they need Redeemer. Galatians 3:19. Since we have Redeemer already, each and every Law, commandment and decree, what ever there may be, are fulfilled by Jesus Christ. He did it for you. And after this they are fulfild also - if you love others as yourself. For those who love God and are loved by God, there are no really Law to follow for the entire Law is fulfilled in keeping this one command: "Love your neighbor as yourself" (Galatians 5:14).
For the law was given through Moses; grace and truth came through Jesus Christ. John 1:17.
Christ redeemed us from the curse of the law
by becoming a curse for us (Galatians 3:13). If and still there is any doubt in your heart, see all Commandments (just to understand that no even one person has been able to keep them and will be not, for all are sinful and in need of Saviour) and anyway seek the Truth, for Christ is the culmination of the Law so that there may be Righteousness for everyone who believes. Romans 10:4.
All who do love, are from God and God's Laws automatically are in his/her heart, for God Himself put them in. All people are exclusively saved by faith alone, by grace alone in/ through Christ alone. The life and godly walking according the God's advices will be what brings peace, joy and happiness.
People who are free from the Law are enabled to live and serve God from the bottoms of their hearts; they are able to love and do more than those who follow and try to live according to the Law. If you are in Christ and love people around you, than you have fulfiled ALL THE LAW.
Anyway, here is the good, holy and perfect Law:
He says that He delivered us out of slavery of sin, out of bondages of it and He is God alone. He says He is who He is and there is no matter what we think about Him. There is no matter who we have imagined or pictured Him as God for ourselves. He is who He is, YHWY, and we are created in His image to love Him all our days.
This first holy commandment is about Loyalty. God created heaven and earth. He created humans and rightly asks to revere, love and respect Him. We must demonstrate our love to Him by having no other "gods" in our lives. This first commandment points that we are responsible to make God as our only supreme authority in our lives. It says we must establish, develop and maintain relationship with Him. We must serve Him alone and obey Him alone.
When Jesus was asked which of all given law in Scriptures is the greatest, He answered – "Love the Lord your God with all your heart and with all your soul and with all your mind." (Matthew 22:37; Luke 10:27; Mark 12:30; Deuteronomy 6:5).
God is the Creator of everything we see and of everything we have and all what we are. All things come from God. Our future is secure only in our relationship with our Creator. Paul warns us not to be arrogant nor to put our hope in wealth, which is so uncertain, but to put our hope in the living God, who richly provides us with everything for our enjoyment. (1 Timothy 6:17).
We must love our God and in all our ways acknowledge Him.
"Lift up your eyes and look to the heavens: Who created all these? He who brings out the starry host one by one and calls forth each of them by name. Because of his great power and mighty strength, not one of them is missing. (Isaiah 40:26).
"The heavens are Yours, and Yours also the earth; You founded the world and all that is in it." (Psalm 89:11).
The Bible begins – "In the beginning God..." (Genesis 1:1). Everything what we do and all what we are, must start with Him. "In the beginning God..." And only after than all the other our daily steps will be blessed. He must be first in all. If there is anything to whom or to what we give priority over Him, than in our live is creeped in false "god" and we violate His very first commandment. There is no another way to love Him as only give Him the priority in all we do, and in all we are, and in all we have.
God must be first in everything! We must love Him above all things!
"But seek first His kingdom and His righteousness..." (Matthew 6:33).