Use IEEE Template (2 column) and default font size: https://www.ieee.org/conferences/publishing/templates.html
Similar to a conference paper. Include (1) Introduction, (2) related work (short version of what you turned in), (3) background, (4) what you did / tried to do different than what other people have done, (5) evaluation, and (6) conclusion.
Paper Writing Tips:
https://cs.stanford.edu/people/widom/paper-writing.html