In writing and typing, the direct equivalent of italicising is underlining. If in doubt, check the Macquarie Dictionary. 7.7 Writing style Active voice. Use the active voice wherever possible. The latter is clear and straightforward.
First person is acceptable in academic writing.
Avoid 'we' unless your work is collaborative. Quotations should be used to support points made in your argument, not to establish those points. Be specific about the referent in order to avoid confusion, or recast a sentence so that a misleading or default pronoun is unnecessary. Acronyms should be in parentheses at the first reference, following the spelled out full form. In later references the letters are sufficient.