That's a good way to be honest. Chatting in English. Its a good way to practice English. Though the best thing to do is to interact with another person with a fluent English. It will test how fluent and spontaneous you are.
If your concern is grammar, you can read books or newspapers (but I'm not fond of them, it gets me bored haha)
Just study the structure of a sentence. And choose the right tense of verb.