I'm learning German and even though I'm not a beginner, I still make lots of mistakes due to not knowing which specific verb the context calls for (a very simple example would be liegen/stehen/stellen - this one can be solved with some googling, but sometimes there are very difficult ones that require native speakers' interpretation) and another reason is sometimes I think in English too much and form sentences in a way that native speakers would not say in that way or form differently in German. So the sub I'm looking for is something like grammar correction and how to sound as natural as possible while expressing my thoughts, etc.