The thing about following Torah – the Gentiles according to Christian scriptures – are given the basics of moral law and that’s about it. If anything the summations from Jesus in Matthew would make good starting (or ending) points concerning what Gentiles need to follow concerning Torah.
Matt 7:12 “In everything, therefore, treat people the same way you want them to treat you, for this is the Law and the Prophets.” (likely based on Hillel)
Matt 22:37-40 “And He said to him, ” ‘YOU SHALL LOVE THE LORD YOUR GOD WITH ALL YOUR HEART, AND WITH ALL YOUR SOUL, AND WITH ALL YOUR MIND.’ This is the great and foremost commandment..” (Even these 2 commandments capture the heart of Judaism in its rituals – like tefillin.)
The second is like it, ‘YOU SHALL LOVE YOUR NEIGHBOR AS YOURSELF.’ On these two commandments depend the whole Law and the Prophets
I am not sure there is much more outside these book ends for a Gentile convert to consider with Torah – it seems like Jesus, Paul, the Jerusalem Council all seemed to avow such things. The basics from Torah are moral – not ritual. Gentiles are not Jewish so no need for them to go down that road.
Even to this day the Judaic faith would give Gentiles some place for being ‘moral’ and following such things.
“Series of laws, derived from Gen. 9:4-7, which in rabbinic Judaism are binding on all human beings. They prohibit IDOLATRY, BLASPHEMY, MURDER, ADULTERY, robbery, and the eating of flesh cut from a living animal. They also require the creation of courts of justice. According to tradition, gentiles can enter into the afterlife if they observe these commandments” (Noahide laws – My Jewish Learning website)
“A ger toshav, or settler convert, also called a ger ha-sha’ar (or proselyte of the gate, as in Exodus 20:10), was a resident alien given permission to live in land controlled by Jews if he or she did not worship other gods or engage in idolatry of any kind or blaspheme God…The ger toshav did not have to perform work on the Sabbath, but was not required to join in worship or perform specifically Jewish religious commandments. Maimonides called them righteous gentiles. They were clearly not full converts to Judaism.” (Lawrence Epstein – “The Theory and Practice of Welcoming Converts to Judaism”)
Maybe we see something like this happening in the early Gentile communities these people like Peter, Paul, James, and John end up dealing with. So I am not sure we are really all that ‘off’ even in Jewish books. Far as I can tell, I would be considered a ‘righteous gentile’ for the life I lead – which falls in line with the Noahide Laws. I would make the distinction – perhaps to their unliking – I share in faith also – which Abraham had and was considered ‘righteous’ (even prior to circumcision).
But that’s my take – I am okay with the teachings on Torah we have in the NT – our scriptures are based on Judaism – but are not Judaism – but do keep the spirit and intent from the Law (which is not a Gentiles law).
***Written to some Messianics concerning the following of Torah