Submitting documents in criminalcase

Your ase is being prosecuted by the public prosecutor because it is a state prosecuted ase.

You are a defacto complainant hence you cannot appear as party in person in this case.

If you want to mark certain documentary evidences from your side then you can file them at the time of witness deposition of evidence 

If the PP is not taking step to file the desired document as evidence then yo can request the court to file them as your side document during chief examination if court allows

Yes, you can file documents through a local lawyer if PP is not cooperating.