you can know your level in a language , by taking an online exams

You can be rated by a teacher for example. You could do it on your own as well by checking online learning sites, there you will find different level of courses (beginner, intermediate ,advanced) . Try the easiest and if you found it too easy for you check the next level. You are at that level,where it starts to get difficult and you need lots of explanation , while you still can manage to understand the context as a whole.

Find a dice. That's how it works here.