I am a students and looking to start my own online business. I recently heard of dropping, any mentors can help me in this? Or any mentor are good in other types of online business?

Hi im a high school drop out and currently having a business idea,can anyone tell me how can i start something without having much knowledge about it?

Currently looking for a mentor with expertise in marketing and building brand, so we can excel in HVAC/Air-Conditioning System sector as a green cleaning service provider.