How do I read git synopsis documentation? [closed]

Question

As an iOS engineer I struggle to understand the git documentation. I looked into the glossary and searched online but couldn’t find an answer to my question.

Example for git checkout: The documentation on it are as such:

1 git checkout [-q] [-f] [-m] [<branch>]
2 git checkout [-q] [-f] [-m] --detach [<branch>]
3 git checkout [-q] [-f] [-m] [--detach] <commit>
4 git checkout [-q] [-f] [-m] [[-b|-B|--orphan] <new_branch>] [<start_point>]
5 git checkout [-f|--ours|--theirs|-m|--conflict=<style>] [<tree-ish>] [--] <pathspec>…
6 git checkout [-f|--ours|--theirs|-m|--conflict=<style>] [<tree-ish>] --pathspec-from-file=<file> [--pathspec-file-nul]
7 git checkout (-p|--patch) [<tree-ish>] [--] [<pathspec>…​]

_{☝️ I added line number myself}

• I counted 7 lines. Is every line a combination of options that can work with any number of the options in that line? ie First line: the git checkout [-q] [-f] [-m] [<branch>] can work with either -q, -f, -m individually or -q -f combined? yet git checkout -q -b branch won’t work because -b isn’t in that line? I mean The first three lines look very similar.
• 1st and 2nd lines: Why couldn't the first 2 lines be replaced with this one line: git checkout [-q] [-f] [-m] [--detach] <branch>
• Also I suppose order isn't important that is for the first line, git checkout -q -f is not different than git checkout -f -q. I tried and the results were the same, but I'm just still not sure
• 2nd line: why are some options in [] but the --detach isn’t in a bracket? How is it different from 3rd line where --detach is inside []
• 4th line: [[-b|-B|--orphan] <new_branch>] how should I read that? I have no clue
• 5th line: what does | mean?
• 7th line: what is () used?
• 7th line: what’s with [--]?

I understand the question may seem broad, but the different syntax commands need to be seen together.