I hope this is true. I'm going to Spain in a few months and my Spanish is ok, but it's definitely Mexican Spanish and much slower than they speak in Spain. I'm gonna give it my best shot, so hopefully people are happy and not embarrassed for me and my mediocre grammar. I've been before but it's been almost 25 years and I was a lot more fluent then.
You needn't worry.The Spanish really appreciate attempts at Spanish in my experience, simply because you have so many people who don't bother their arse and just assume they speak English, which invariably they do in the service sector.