iainc13,
congratulations on getting your interview even though it is with KLM one of Europes oldest and most established airlines. I admire the fact that you are prepared to work in Europe ( trying to remember which continent Lincoln is in) but as you say "a job is a job." Will you be quoting that to them at the interview ?
I am not sure what you mean by "start off small even if you are used to jets". I suppose a First officer position on Turboprops with a major airline is a bit of a let down if you did your training on 747's but not many people do. Still as you say "everyone has to start somewhere.
I wouldn't advocate your advice to KLM at the interview as they might ( and I am only guessing here ) be singularly unimpressed.
Still good luck.