Courses for exapanding a brand.

I have an instagram page of a niche brand that it's growing at a good pace since I start it 3 years ago. The niche is not that saturated and I know the field fairly well. I'm starting the Authority Hacker course in hopes to make in the long run a big blog and website that I can monetize and sell stuff from my niche, I'm thinking big like starting a youtube channel about the niche and a tik tok doing viral videos (I have a good idea about what kind of videos people in the niche would share & I can make them, but I dont know shit about tik tok)
What courses should I look up into if I want to expand as big as I can?
Theres a bunch of instagram courses and tik tok courses I want to look on to the good ones, usually bhw have some good insights in this.

Thanks for your help.