Personally, I would apply. Applying is not a commitment. I wouldn't feel bad leaving my current job if that is what I really wanted. I have to put my family first and you would be surprised at how many people need a job and would take the position you left in a heartbeat. I am at a crossroads myself and am unsure about what and where I want to work (I just earned my B.A.). My issue is that all the jobs I am interested in want a degree (which I have now) AND experience (which I don't have yet). I think you already know in your heart what you want to do and you should def. follow your instinct