Finally, I don’t know your level of experience. However, it’s very common for people to jump into trying to make money from photography before they really are qualified for it. I don’t personally think there’s integrity in taking peoples’ money as your training opportunity rather than when you’re actually ready. But if you’re having issues with technique and cannot reliably deliver the results that people want, maybe you should reassess whether you’re in a fair position to solicit clients.

I would add to this that if one has no expertise in a field, rather than charge a third of the price accounting for it, which won’t make you rich, will not make the customer happy with quality and will damage the market, it’s better to serve as an assistant for a professional and when the expertise is acquired start asking for a price on par with the market