I use an app on my mobile to exchange languages and the exercises of some of spanish learners amazed me
This last night a guy from USA was asking for help with an images from his book, showing an exercise about topics I studied when I was in the advanced part of my secondary school.
Often, some people who can't shape a sentence correctly ask for help on topics that even I can't resolve, even when I am a native speaker and I have studies in three different areas, maybe because those exercises are immerse into a context, but the reality is that they show an incomplete sentence followed by a dotted line and no more information. Pluscuamperfecto... even the title is scary. Anyone could feel in depression.

I think that as long I can't write, listen or speak english for getting a simple conversation, I won't concern to understand so advanced english grammar. Even more, I think that at my age I never will able to analise the opera of Shakespeare or being a professional locutor. Even more, if you are a foreign one, your foreign accent is a part of your personality. You are not a native one, it is not a sin, you just are born in another place.  Why is it wrong?
Then, since my point of view, step by step, the basic is first, then getting a conversation, pass information without distortions and if you want, and only if you want  then you have time enough to polish your skills.

(I'm sorry, "to polish" means "to improve", it is one of our regionalisms in case it is intersting to you.)