[Clubber]

>How do I realistically compete with those who are younger, more nimble, with impressive educational & professional backgrounds?

Most devs out there right now are hot garbage, even with 10+ years experience and a degree. I just went through a few rounds of interviewing applicants, so I know. If you are passionate about it, you need to be building stuff in your spare time and learning constantly. If you don't like it that much, the field probably isn't for you.

If you are really starting from scratch, hit up the recruiting/job sites in your area and learn the language that has the most jobs. You need to learn database too.