Honestly, you fail a lot before you learn where the line is. You frame the training as industry best practice with a certification that they can sell. You frame them going to the training as leading the organization through it and from the front. You then let them learn and put their own spin on it during the instruction.

The real trick is getting them to think it was their idea. Start with a quantified problem statement. Your recommendations to address the problem should come with multiple courses of action that they can choose from. It helps if these COAs are framed as beneficial to the organization outside of addressing the issue. As long as they accept that the problem exists, they should address it. If your preferred COA has other organizational benefits, they'll pick it and align behind their decision with resources.

Go look up some industry certifications and congrats, you can now be a (lower level) consultant. Congrats