Hi there I may be able to give to advise - i have been working full time as a mentor for several years. The best thing I can suggest is When you have some live account verified statements to show your success, reach out to big tutoring providers, i.e. babypips, forexfactory, or paid services like Forexmentor and offer to teach your methods...
Once you get in with them, building a name and reputation follows, and from there as and when you build that reputation you then start to bring your own products out. Public opinion is as powerful as some certification - this is what has enabled me to grow as a provider.....
Also - my member count has grown 10 fold since starting a service specific myfxbook profile. Also review pages on fpa - VERY important stuff.
Its all about credibility and standing out in a business that is full of crooks.
Another option is to umberella under an FSA regulated trading firm, if you have real account track record and clients, this is very easy to do
I also believe in the power of demonstrating skills though actual performance. If you also write articles for authoritative publications this can bring up your credibility. Maybe you can apply for a PhD in the field as well at any relevant university.
It depends if you want to teach people who are totally unfamiliar with forex market or to teach people become better traders. In both ways I believe you should show some results and simply become more popular.