I think even taking that step is a positive one, I hear too many people complaining about their jobs but never actually taking a chance to go for what they want. I quit a miserable job a few years back, volunteered at a local school, got a job out of it too as a maths teacher. Ended up leaving though as by chance an opportunity came up doing something quite exciting I hadn't considered and am still in that same job 4 years later and love what I do. Its not always easy, not fun and games, can be stressful moments, but keep your eye on the end game!