Liberty of Grace

Hebrews 7:12 For the priesthood being changed, there is made of necessity a change also of the law. 

I'd {} recommend [one] follow the true doctrines of Paul, that give us liberty in Christ to eat freely what we want. As trying to follow the Old Testament puts you under the Law, and when you observe dead rites and rituals, and works of the Dead law you do not accord to righteousness, and that's the entirety of the Pauline Epistles, is teaching us that works of the law and flesh cannot save us, or dead rites and rituals that have no effect of righteousness whatsoever.

A question, why would God want you to worship through observance of dead rituals like diet and not working a specific day? That doesn't do anything for anyone but yourself, and actually makes you violate God's commandment, as by trying to observe those rituals, you dishonor the greater commands.

As it is Jesus' teachings of the Wine Skins has meaning, and that's what it means. The old Wine Skin is the Law of Moses, and the New Wine is grace. Don't burst your skin, but come back to Christ and the liberty by which you were bought, and not into bondage to the Law of dead ritual and selfish oblation to naught.