Possible Clues:

• Boastful, given to showing off
• Two thousand poems in Italian lacking propriety
• Major way up, two ways forward
• Full of oneself
• Indecent, indecorous
• Pretentious as Mussorgsky's introduction?
• Brazen way in writing to enter appeal
• Indecent or shameless, perhaps in dress
• I am leading the way on the street, being bold
• It's incorporating ways to pursue egoism, ultimately