Student finance help!

Hi so I'm a first year applicant who is trying to complete the student finance application but I'm unsure in a few things :

- I had my name changed- do I send my deed poll and birth certificate to sfe through the post or is there a way I can do it online?

- The PFF2 form - I have completed it but I'm confused about section 6 on child dependents - do I include my younger siblings who are still in school but do not work? And what about siblings who are over 16 but work a regular job like McDonald's? - sorry this part was really confusing for me so I probably sound really dumb asking this

- lastly I know it takes 6weeks to process everything but is there a way it can be completed earlier? I have yet to receive an entitlement letter

Thank u so much in advance to anyone who replies with answers!