1
general::
Phrase(s): go it alone
to do something by oneself. • Do you need help, or will you go it alone? • I think I need a little more experience before I go it alone.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Undertake a project, trip, or responsibility without the aid or presence of others. For example, If you decide not to help, I'll just go it alone. [Mid-1800s]
American Heritage Idioms