We did well with Twitter (web3 learning as well). If you reach out to influencers and blogs in the space, they’re usually open to sharing free resources.
If you have the time, regularly uploading YouTube videos will get you some traction.
We targeted beginners as well, and having the selling point being what they’ll learn to build was a better selling point than selling the technical skills they’ll learn.
Just be prepared this is a tough space you’re entering. A lot of the larger competitors with big financial backing (buildspace) exited the space for a reason.
I’m skeptical since you referred to it as “OpenAI technologies”, but there’s a whole directory dedicated to marketing agencies. Scrape that list, find the right contacts, and if this is as good as you claim, you’ll find your first few customers here.