It all depends on your financial situation. If you are confident that you can support your family while pursuing higher education, then you could get go ahead. I had the same desire several years back but the responsibilities of the family simply did not allow me to do so. Also, there are several other factors you must keep in mind. Just by getting additional qualification does not guarantee you a job in Qatar. You may not be able to get back the opportunity of working here again. Furthermore, what surety is there that you will be able get the salary level required to bring in your family here after you have received the additional qualification you are aiming at. The job market in Qatar is tight, and competition severe. However, if you are confident you will be able to stage a return, then by all means do go ahead and achieve your dreams. I suggest you consider all aspects before you make your next move, as you are the best judge of yourself.