Just remember what the New Testament teaches. We need not become Jews to become Christians. There are a lot of helpful lessons in the Torah, read and learn. But we need not become Jews to become Christians.
The Torah is the first 5 books of the Old Testament, it has always been part of Christianity. There are many Christians who know the Torah, but do not follow all the rules. But know the teachings. They are not trying to become Jewish, but hopefully have a better understanding of the Jewish faith and less antisemitism will exist in the Church if people study it a little more.
You can either convert to Judaism, and would then be Jewish; or you can adopt the belief system of Judaism, and follow those laws that pertain to non-Jews; both of which you could perhaps call "following Judaism". Neither is compatible with any kind of religious belief in Jesus; and in either case, the Rabbinical teachings would be essential, i.e. you're not a "follower of Judaism" if you just go and interpret the Scriptures on your own.
I think they're misguided and don't know their Scriptures. The book of Galatians clearly states that we're no longer under the law. Christ fulfilled the Law perfectly for us so we wouldn't have to do it. A lot of the Law is just common sense anyway, like treating people honestly in business dealings. Don't charge your countrymen exorbitant interest rates. Help widows and orphans. Help your neighbor get his cow out of the ditch if he needs help. Don't gossip about others. The list goes on. Most people know this instinctively, but it was written down so people couldn't use ignorance as an excuse for bad behavior.
You are putting the proverbial cart before the horse.
We are commanded to follow Torah because we are Jewish. Simply following the teachings of Torah does not make you Jewish.
As a Non Jew you may wish to lead your life in such a way that it is consistent with Torah, but you are not obligated to. As a Jew, you are under obligation to do so.
Both Christianity and Judaism profess in basing their fundamental belief upon the Written Torah. One subtracts while the other may add, each possessing man-made traditions that may compliment the Written Torah or work against it.
My opinion is that "all people" trying to learn and follow the Written Torah is neither following Christianity nor Judaism. They simply have it in their hearts to take hold of the covenant with their Maker, The God of Avraham, and enter into His Kingdom physically in the Land of Israel.
Isa 56:6 Also the sons of the stranger, that join themselves to YHVH, to serve him, and to love the name of YHVH, to be his servants, every one that keeper the sabbath from polluting it, and taker hold of my covenant;
Isa 56:7 Even them will I bring to my holy mountain, and make them joyful in my house of prayer: their burnt offerings and their sacrifices shall be accepted upon mine altar; for mine house shall be called an house of prayer for all people.
Isa 56:8 The Lord GOD which gatherer the outcasts of Israel saith, Yet will I gather others to him, beside those that are gathered unto him.
but he is a Jew who is one inwardly; and circumcision is that of the heart, in the Spirit, not in the letter; whose praise is not from men but from God. Romans 2:29
A literal translation:
but he, inwardly a Jew and circumcised of heart, in spirit and not from a letter..does not have praise from man but from God.
Paul then goes on to say there is every advantage of being a circumcised Jew because the Word of God was given to the Jews.
The Law/Torah isn't really mentioned. The word 'letter' could actually be translated epistle or letter. If Christians believe Yeshua (Jesus) is the Word (Logos), then that should explain things. Sadly what is so often taught replacement theology confusing and misleading many.