Wait for USCIS to review and respond to initial submission. You add additional household member, as co-sponsor if relevant and appropriate.

Grant of GED and driver's license are state government functions not under US immigration laws. You may contact specific agencies for assistance...

It is possible to get I-94 H1B, with supporting documentation as an HIB. In your case I-797A.

Your question is a little unclear. You did not mention or explain any negativity in your inquiry.

It depends on various factors. Your application is adjudicated on its merits.

You don't make the decision. USCIS makes the decision based on review of your immigration history.

You may consult with any attorney in private for guidance.

Yes, but be prepared to explain the discrepancy to officers at POE, if needed.

It will depend on Canadian immigration law. Contact a Canadian lawyer for further guidance.

With a valid passport and a PRC, you may return to home country for a short visit while N-336 pending.