You are surrounded by examples and lessons and case studies that clearly aren't exactly about your project. There's never been a book written precisely about the situation you are facing right now, either. Perhaps one day they will publish, "Marketing Low-Cost Coaching Services to Small Businesses Specializing in Graphic Design in the Upper Peninsula for Dummies" but don't hold your breath.
Marketing, like all forms of art, requires us to learn to see. To see what's working and to transplant it, change it and amplify it.
We don't teach this, but we should. We don't push people to practice the act of learning by analogy, because it's way easier to just give them a manual and help them avoid thinking for themselves.
The opportunity is to find the similarities and get ever better at letting others go first--not with what you've got, but with something you can learn from.
And the opposite is even more true. We over-rely on things where the specifics seem to match, but the lesson is obscured by the trivial. Sometimes when we see something happen that we can learn a conceptual lesson from, we instead jump to conclusions that the specifics are the important part.
Remember that the next time you have to take your shoes off before you get on an airplane.