I got my GED through the RACEC almost 30 years ago and I don’t regret it at all. Obviously it’s probably a lot different now, but I gotta say, it was run by some of the most caring and genuinely helpful folks I’ve ever met. Totally changed the outcome of my life.

OP, call them up, go to the classes if you need to, and schedule that test.

(And then see about some community college classes after you get your GED. Seriously—jobs often ask how much schooling you’ve had and “some college” is an option. That puts you on a level playing field with anyone else who went to college but didn’t get a degree—regardless of whether they got a traditional high school diploma. If you can get through a couple/few classes, it’ll make a big difference.)