You can write, that much is obvious. You have the portfolio to prove it, here on Medium and maybe elsewhere. You know why you want to do this. And you have the support of your partner. I think that’s all you need at this point.
Sure, a degree would help but I would suggest not going back to school just yet. First, it would destroy your momentum. Second, there’s a difference between what people look for in a twenty-two year old versus a thirty year old.
That you interview well is a major strength. Talk your way in and educate yourself on the job and beside. This is expected anyway.
All the best. Also, kudos.