I don't have any technical know how, but I have worked as a product manager for 3 years. I am fairly good and UI/UX and have ideas for my own start up (which, amongst other things, will include a web-based and mobile product).
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Go to a full-stack web development bootcamp if you are interested in building an app.
A better idea would be to get a co-founder. You need a technology partner with you. It is incredibly difficult to launch and run a successful startup by yourself.