it is very unlikely that you will be able to successfully start something that is outside of your area of expertise and the opportunity cost of failure is quite high for you. Instead, I would recommend thinking about what tools and/or applications would help you a lot in what you are doing now and if you think you came up with a good idea, either try to mock it up yourself or look for a partner/co-founder who can create a working prototype for you, or just hire a contractor to do it. None of this requires quitting your job, just the opposite