Another option is to use an agent, they can open bank accounts whilst on visa exempt or tourist visa providing you are immediately applying for a long stay visa. Not cheap but an option if you don’t want to leave the country.
A TM30 report is good for your entire extension of stay duration. You do not need to report again as long as you have a current report for that address. New address equals new report.
Your educational qualifications and what you intend to do after the visa expires are irrelevant to your DTV application. Simply compile the required documents and submit.