Possesive Pronouns-indefinite Article-"devotion" Word

[Jesule]

Hi! How is Sunday going? Thanks in advance!

My questions:

1.- Possessive pronoun. "My". Can I leave it out?

"My" home is a prison cell. Would it have the same meaning?



2.- Take a look at this sentence.

On "A" Sunday I had to go to school. Can you believe it?.

I would like to mean "I had to go there on Sunday, but it´s not
known which Sunday"
Can I use the indefinite article or should I say that in a different
way?. Maybe "One Sunday", "A Sunday"? I´m not sure.


3.- "Devotion". Can I use this word to mean someone believes in
God and practices one kind of religion.

"My friend´s devotion to God is really huge"

Enjoy the last day of the week!


Jesús

[Tdol]

1 You could, but then it could either refer to your home or to homes in general. However, the rest of the text would make it clear what you meant.
2 I would change the word order- I had to go to school on a Sunday. (It sounds better to me coming after the verb rather than at the beginning)
3 Yes, you can. I'd say 'great' rather than 'huge', though.