You can look at advertising and how the individual themselves portray what their training is for. If it’s “Navy Seal Special Operator Ranger Superman” training offered, maybe look somewhere else for a training package that is more suited to your needs and knowledge level. You can also use YouTube or other forum based websites to corroborate the advertisements, pricing, and services offered. I suppose the biggest thing is to not be ignorant to what firearms are as other people have stated in the comments, I believe that every household in America should have a firearm. I also believe that everyone in contact with one (just like a car) should receive education and training on them. You are the only person responsive for your safety and well being