android,,,, help help for pin number

Hello Everyone, I Have an Android Target at the Same House Using the Same Network. I Need to Install Spy Software and There Are Many on Google but They Need to Be Install on the Target Device,,, but, the Hard Part Is the Target Phone Has PIN Number and I Don't Know It. I Need Assistance to Done with That at Least to Get the Pin Number Step by Step Because I Don't Have Much Experiences or if Any Can Done with It and I'm Ready for What It Have to Take.

Thank you.