Your first price is almost always too low
Ask someone how they arrived at their price and you will usually hear a version of the same answer: it took about a weekend to make, so it felt wrong to charge more than a few euro for it.
That reasoning prices the weekend. Nobody is buying your weekend. They are buying the part where they do not have to work out the structure themselves, and that is worth roughly what it would have cost them to do it badly first.
A useful reframe: what does the buyer avoid by having this. An afternoon of false starts. A pricing decision they would have got wrong. One refund policy they never wrote and later needed. Add those up honestly and the number is rarely three euro.
The counter-worry is always the same, that a higher price means fewer sales. Usually true. It also means fewer questions, fewer refunds and buyers who actually open the file, which matters more than the unit count in the first year.
Start higher than feels comfortable, and let the first ten buyers tell you if you were wrong. Lowering a price later is easy. Raising one after people have shared the old number is not.