.........but didn't know who to ask can be found at Breslov World. They have quite a few articles in the Holydays and Fast Days - Pesach section of their website. You should be able to find the answers to your questions within those articles.
Q: What about gentiles, aren't we suppose to keep the laws and the Holy days too?
A: Hashem gave seven commandments to non-Jews. These commandments are referred to as the Seven Mitzvot Bnei Noach or the Noahide commandments.
"Whoever among the Nations fulfills the Seven Commandments to serve God belongs to the Righteous among the Nations and has his share in the World to Come." - Rambam
There is an excellent article at Breslov World about the Noahide commandments. With Passover approaching, I can't think of a better time to learn about them.
