OCI Application - Current Passport Upload

I am currently in the process of applying for OCI and had a question around uploading my current passport.

For context I am a dual citizen living in the UK.

Would I need to upload full passports (all pages) for both my passports? Or just the ID pages are enough?

For employment/work letter, I am guessing I need to request a proof of employment from my employer or would something like a payslip suffice?

From my understanding, self attested photocopies just means writing my name, date of birth and 'certified true copy of the original', right?

Apologies if this has been asked before but appreciate the help.