Having an undergraduate degree of some form is handy, as it will prevent certain doors from closing and ensure that you don't end up having to put in a few years at a lowball rate. But a Masters degree doesn't really tick any boxes for pretty much anybody in this industry. It might get you a few grand extra in your initial offer, but probably not enough to offset the opportunity cost.
Coding Bootcamps and similar things won't really help either. Building things will.
You already know how to program. Go register a domain name, build something cool, and stick it there. Better still, build something that people will pay money for each month. Either way, conjure something into existence that you can point prospective employers to and say "I built this" (and thus "I can build things like this" and "I will build them for you if you hire me").
Keep your sales job until you get the offer you want, then simply step into your new life.