Rajesh, I'm a few months behind you on exactly this. I came over first for a nursing job and my wife Ada is applying as my dependant now, so this thread is gold.
What we're doing, in case it helps anyone at the same stage:
- a shared folder with everything that shows the relationship, going back years: marriage certificate, photos, joint statements, messages. Our adviser said the story matters as much as the certificate
- starting her police certificate and translations at the same time as the application form, not after
- checking my own payslips match what the form asks for, because her application leans on my job
@Sofia Mendes on work rights: from what we were told it depends completely on the route, so we checked the official page for ours rather than trust anyone's summary. Worth doing early, because it changes how you plan money for the first months.