According to your point, it reflects that the work pressure is not much. So why to leave your job and then learn a new technology? You can do it simultaneously with your work. Already you are working for 2 years, so it won't be difficult for you to manage your time.
Now a days number of jobs in private sectors are in a bad condition, and if you leave your job and then start learning new things it will take time also. Once you go for some another job, the interviewer surely going to ask you what have you done in past two years and why did you leave your previous company? Make sure you have a convincing answer to it.