The hardest part of starting Spanish
As a native Spanish speaker learning other languages, I often struggle with some characteristics of my target language that makes more difficult to sound natural when speaking. Let's take pronunciation as an example: there are some sounds that I'm not used to pronounce in my mother tongue (those soft 'r' sounds in English and French that make me think twice before pronouncing the more familiar, strong palatal spanish 'rrrr').
But, if it is difficult for me, for Spanish learners must be difficult too.
So tell me, which parts of Spanish learning do you struggle the most with? Grammar tenses? Or maybe vocabulary?