How to do a braided mohawk by yourself ? Help ?

I'm not sure how i'm going to do it but i really want it done and my sister isn't willing to help me, my mom never does my hair (because i'm usually good without her) so can someone tell me how i'm supposed to do this ? btw i'm transitioning to natural hair and i'm 9 months post relaxer if it helps i'm 12 years old and i'm REALLY good at doing hair i know how to cornrow and flat iron and blowdry and plat and i can do a number of styles i just need a little help with this one thanks! nice not rude answers please !