If you're really wanting to live that way, then you should bypass Jesus all together. Go straight to finding a Jewish priest to sacrifice animals to forgive your sins and have a separation between God and man. Why live under the Law? Jesus abide by the festivals and practices of HIS culture at the time. Judaism is not our culture. Jesus adopted us into His family as gentiles. He made it so ALL people could come to Him as simply as accepting and believing on Him. He made it easy as that. Trying to go back into His culture and saying we should be living in that culture, even though He came and died so we wouldn't have to, is backwards. These were the rules and laws and methods to follow God. Now all we need to reach God is Jesus Himself, not rituals, rites, practices, ancient cultural parties, etc.
Thats not to say that there's nothing to learn from digging into Judaism and its ties with Christianity, but to imply we need to begin living that way again is a whole different story.