Keeping the law is not intended to be difficult.

Matthew 11:28-30 KJV
Come unto me, all ye that labour and are heavy laden, and I will give you rest. [29] Take my yoke upon you, and learn of me; for I am meek and lowly in heart: and ye shall find rest unto your souls. [30] For my yoke is easy, and my burden is light.

Is it work to not murder? Is it a pain to not steal?

Write the Commandments upon your heart and the rest will follow.