What should I do?

I have always wanted to work in the this industry. However due to a issue in my past I have my minor midsdaemenor in my past all bit a SD misdamenor. The misdamenor has been expunged but just in way that finra wont recognize it . 1203.4 that some idiot foolish liberal lawyer at FINRA uses means to ignore expungments. I have been told I need a MC-400 will any of the wirehouses support this? Or is off to Bobs financial planning or I have to wait years before the SD period lapses to come into the industry.

Thanks,