In my opinion, learning English is very important for us and it is not very easy to learn it well.
First of all, English is one of the most important languages in the world like Chinese. If we can learn it well, it will help us a lot in the future. We can talk with foreigners, work with them without problems and understand each other. There are lots of foreigners in China right now and I think I could visit a foreign country one day, and I can use English by then.
However, English is not very easy to learn. There are a lot of words for us to remember and the grammars are difficult. I need to do many exercises to understand them. Speaking is much more difficult, because we are Chinese and there is not a good English environment around us.
Anyway, English is not very easy to learn but we must learn it well.