Um...According to the rule of learning our first language,what we do at the beginning is listening. We start bubbling at the 3-month-old and the start speak some meaningful words at the age of 5-month. And then the next thing come up with it would be reading and writing is the last and also the most difficult part. So, I suggest you to get enough practice on listening first. 我可以說的是，根據我們學第一語言的自然規律而言。我們最先學習的是聽力，大概在出生三個月的時候開始牙牙學語，五個月大的時候開始說一些有含義的話。然後下一個緊接而來的步驟就是閱讀，最後也是最難的部份是寫作。所以，我建議你先要有充分的聽力練習。

"Be a reader before a writer" is the expression. Meaning, understand what you're going to say before saying it. So my vote is for listening. But not listening alone; always have a go speaking as you work on listening! :)

There is no first or second in language learning. Try to practice every field of a language at the same time. Everything is interrelated. The more you will practice, the more you will get, all the fields of; Speaking Listening Writing Reading.

first improve your grammar =)

Hi... On Italki you can practice both at the same time ... Good luck!