SHALOM!
You are a member of the HOUSE OF YISRAEL / ISRAEL, because you were grafted in by ABBA YAHUVEH / YAHWEH, the Vine-dresser (into the VINE which is YAHUSHUA HA MASHIACH).
Read all of Romans chapter 11, especially v.16-21.
You are therefore a Spiritual Jew if you have accepted YAHUSHUA as your MASHIACH / LORD and SAVIOUR plus faithfully follow HIM spiritually!
All of the covenants made with Yisrael / Israel are yours through the Blood of YAHUSHUA HA MASHIACH.