A Woman Praying in a Different Rite from Her Husband

I recently married a Sephardic husband who prays according to the Edot HaMizrach rite. For about 9 years I was part of a Chabad community and prayed according to Nusach HaAri from the "Tehillat Hashem" siddur. Today it is difficult for me to get used to the siddurim and the rite of the Sephardic community, and this affects my concentration in prayer.

According to the rulings of the sages of Edot HaMizrach, and in particular according to the Shulchan Aruch and Rabbi Ovadia Yosef zatzal:
1. Am I obligated to switch immediately and fully to the Edot HaMizrach rite in my private prayers, including the silent Amidah, or may I meanwhile continue praying according to the Chabad rite until I get used to it?
2. What is the law regarding the prayers of the festivals, and especially on Yom Kippur: may I use a Chabad machzor?
3. Is there a need for hatarat nedarim before switching from the Chabad rite to my husband’s rite, after I have prayed this way for about 9 years?

Shalom u'vrachah 

You are not obligated to switch to a rite that you are not accustomed to. 

If you wish to switch, you do not need hatarat nedarim. 

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