an inspector calls

Ah, "cant be changed", my favourite quote from the book

If you want my advice, don't limit yourself to such short quotes. Sometimes/most of the time short quotes will be good, such as "fire and blood and anguish" (you forgot the second 'and' - you could argue this repetition carries the momentum of this vehement phrase, also creating a list-like effect of the suffering). Here you could easily analyse this tricolon, with its hellish connotations, especially provocative to a post-world war(s) audience... These words are quite strong and so should be easier for you to be able to talk about (fire, blood, anguish). I gave you the name of a device (tricolon), a brief analysis (it has hellish connotations), and it's impact on the audience & some context of the play. You should go into these things in more detail and explain a bit more (e.g. on the context part).

An example of a quote better when made longer is "You're not the kind of father a chap could go to when he's in trouble." Contrast of colloquial 'chap' vs formal 'father' emphasises their clash of personalities and how they regard themselves. Eric talks about himself in the third person here ("a chap", "he's"), suggesting his embarrassment at his actions or his unwillingness to (completely) take responsibility for his mistakes, or unwillingness to confront his father.

So if you are ever stuck on a quote, consider learning a bit more of it to help. For that "community and all that nonsense" quote you have, you could have said Mr Birling feared being "all mixed up together like bees in a hive - community and all that nonsense". There is an easy simile to analyse... think about bees and how they all work as equals for their hive (society)! Does Mr Birling want this?

Good luck

Well ideally in an exam you can either use your own quotes from memory, or choose the good quotes in whatever passage they give you (depending on your exam board). If you do have to analyse a quote which you have no idea about, you could talk about an adjective or noun and if it has a deeper meaning or if you can infer something less obvious from it. Or you don't always have to talk about language, as you can use a quote and just talk about context around it. I don't really know how to help you other than make a list of all the main quotes (most of which you already have down) and analyse it beforehand if you can't do it in exams. Ask teachers for help on analysis. If worst comes to worst, just waffle your way around a quote using flowery language and so you seem smart - like a 10% chance of tricking the examiner lol. But don't waste too much time waffling.

Sorry I cant be of more help