I don’t know if Donald Trump Jr

I don’t know if Donald Trump Jr. got any useful dirt on Hillary from the Russian lawyer.
But answer me this:
Let’s say I go to buy a bag of pot. I pay my money, I walk away with what turns out to be a bag of oregano. Or I want to buy 100 ecstasy tablets, I pay my money and walk out with 100 aspirin tablets in a baggie.
In either of those instances, I’m guilty of a crime, I can be charged, tried, and convicted, even though no illegal substances changed hands.
So if DJTJr. went to the lawyer to get dirt, isn’t he guilty whether or not any useful information was obtained?