Best online resources for starting my own online business doing research mentorship / tutoring/couching but also consulting (topics in academia, global health, intl development)…

I have a ton of professional experience and academic creds, but have only worked for companies - not for myself besides some random tutoring here and there. I have done all these things professionally though and I see the niche market.

I am completely ignorant of where to start, is this an LLC? What how and where do I register? What are the benefits of different types of business registrations?

I also don’t really want to market myself as a brand, I know I am part of it and that’s okay, but I’d rather it be a company than me - the star. I don’t like the whole LinkedIn persona, I want this to be more discrete (and I know many people who access these services prefer that too).

If you have done this, what is your best advice for a complete newbie?