That all depends on what you want to do, which direction you wish to go in. Do you want to start your own company? Do you want to settle for a stable job? Do you want to study? Asking other people what you should do will be of no benefit to you if you do not provide the context of where you wish to be headed. I could have very easily decided to troll this thread and written a reply that told you to spend the last of your money on fine Scotch, but instead I wrote this.
If you want to start a business, then start one. If it's a software business, learn to code however you want or do not learn to code at all. You already know marketing, you already have experience in a startup environment, the only key things to follow now would be to find a product idea and iterate, iterate, iterate.
Note that I said "find" a product idea and not "think of a product idea". Thinking of one is a waste of time, because that requires that you spend valuable time finding a target market and then more time finding product/market fit through market evaluation & validation. Rather find an industry of easily contactable people, and ask them what pains them about their job. By doing so, you will have identified a problem as well as the market validation of the solution to that problem. From there you can come up with a product, which you can use to wireframe. Discuss the idea with your chosen businesses, get their feedback and ask if they would pay for it. Verbal financial commitment = done. Some might even invest. All that's left to do is hire the people to build it and the rest is all up to your skills and experience.
If you want to instead study, rather than create your own startup - heed this warning: You get what you pay for. That being said, you can easily learn material online, as a degree in tech is not necessarily important in tech (you're already qualified, and that is at least something that puts you ahead of many others). I wouldn't recommend sound design and music production - all of my DJ friends (amateur or professional) don't even have a day of high-school level musical education to their names. Some have a knack for it, others don't.
If you just want to pay the bills, then get a job. I've found that asking previous employers for a simple paragraph of how, in any way, I benefited the company - and use that in a resume under your the work history section, does help get you that little bit farther.
What you should NOT do under any circumstance is delay. You are not getting any younger and money don't grow on trees - get up, get out, and do something to get you back in the system.