Do you have any tips for fasting alone in a household of non-Muslims (this is also my first time fasting for Ramadan)?

I pray to Allah to bless you and make it easy for you. You may do well to know that you are starting with a clean slate when you start with your practice of Islam; as such, your good deeds will merit greater rewards from Allah.

Since I don’t know much about your circumstances, I can only list here some general tips in the hope that they would help:

1. Keep your mind focus on the thought of Allah by practicing the remembrance: invoking His mercy, forgiveness, and grace.
2. Try to read and reflect on the meaning of the Qur’an as best as you can.
3. Practice introspection and contemplation of the signs of God in nature and the scripture
4. Try to do the good works as much as possible.
5. If you have the means, give charity to share the blessings of God with the less fortunate.