I have two biggest challenges when I am learning English in daily life.
1. I think it is so hard for me to expand my vocabulary nowadays, especially those high-level words.
It is partially because I haven't got as much as time like a high school students to remember the words. But what is more challenging is, even though I tried hard to make sentences and use it in real context,
I would finally forget it somehow afterwards.
2. I can't help making mistakes when I speak. I want to speak accurately and fluently, but it is so hard to meet both at the same time.