Interesting post-mortem! I will say that you honestly do not need to have experience with any of the skills you felt you lacked—the point of a jam is to gain said experience in a small and manageable way. If you took the time to prepare yourself by reading up on beginner-friendly material and asking questions to people in those fields, you've already done plenty in lieu of personal experience! Also remember that it is a team effort, so the people you bring on board to handle those aspects are bringing their specialized skills and understanding. Anything you communicate in your creative vision as director, they have a duty to assess as viable and work with you on solutions or alternatives that are achievable given the resources and timeframe you all have.
I also would argue hard that your characters do have a place in "the market". Your consumers are real people, as are you. You are not the only person out their with your experiences or interests. Making such content accessible draws those people in who are looking to see such representation, and can even be an exciting surprise to people who took a chance and realized they didn't know such rep could exist. Can it be everyone's cup of tea? No. But I imagine you create to be authentically you, and that quality is magnetic to the people who would appreciate that and will support you for more.
All the best to you and your next endeavor, Jenny!