Can I file I824 Form by myself based on approved I140 petition?

No. You must have a finanial sponsor who qualifies based on his/her income and/or assests and is a PR or Citizen of the United States.

Yes, you can file for the "action on an approved visa petition" I-824 form by yourself. However, there may be a delay in the decision by USCIS, which may prove frustrating. If you cannot figure out the answers to the questions or believe that you have waited too long, then I strongly recommend an appointment with a competent and experienced immigration attorney.