aww, I missed a career as the German equivalent to Mata Hari, then. I even can pronounce Schiphol correctly.
Your ch is very similar to the Swiss ch.
I have the impression that the Dutch L is formed a bit further back in the throat than the English one. It leans a bit towards the R, so to speak, and - like in English - you use the whole tongue to pronounce it, while the German L is formed immediately at the base of the front teeth and only with the tip of the tongue.
Interesting, how a few miles can make a big difference with languages.