If you don't feel inclined to work on writing skills right now and you don't need to, i.e. you don't have any exams coming up, and you want to leave it be until later, it's your prerogative!
If you are worried about your writing skills you can always focus on improving them while continuing to focus on listening and speaking. It doesn't have to be either-or, you can work on different aspects of the language at the same time if it gives you pleasure. It really doesn't have to be all or none.