If you did that, wouldn't the dream be the first of the night, meaning you are very unlikely to remember it? or would you probbably dream about the same thing throughout the night?

Also, what about autosuggestion? It would probbably be less specific, but easier. Like just keep repeating "I will dream about (whatever) and I will rememebr the dream" in your head while you fall to sleep. would that work?

Just some thoughts, correct me if I'm wrong about anything.