[Storebror]

I do not have anything against trial and error, but the thing in it is that the one doing it should try to learn something on it, how it works, get some "Bon voyage moments" and bla bla bla.

You're absolutely right.
Generally speaking I'd expect a modder to provide some basic skills in order to be enlightened of the remaining skills missing.
Then, when the modder became introduced in the more sophisticated stuff, he/she should be able to prove reasonable progress in learning the do's and dont's. Anything else is just a matter of time then.

It's pretty much like applying for a job.
Leaving a few exemptions, you're usually not expected to be the super-duper-ultra-senior-professional in exactly that single position you're applying for.
What you're expected to is to provide the required skills to take up the employment and assimilate the input from the pro's teaching you the rest.

Best regards - Mike