USCIS will reschedule regardless of times canceled.

A one time referral should not be an issue.

Best to refer to USCIS processing times for guidance.

No this doesn’t constitute being a public charge.

The birth certificate should suffice.

Best to communicate with a criminal defense attorney.

This shouldn’t be a problem with valid passport.

No tax submissions are not required for I90 purposes.

Yes this is possible and you should provide evidence of shared residence through statements.

Provide a statement re: knowledge of addresses.