From your updates it seems to me that you like the idea of doing something (anything) which has good progression and pays well, but you don’t know or really care what that would be. Is it because you feel less when you’re in social situations? What is your motivation for wanting this? You haven’t mentioned that yet. It could be as vague as wanting to provide a better future for your children, but you haven’t mentioned, even vaguely, why you want a career, other than this envy of your DH.
The thing is, unless you’re passionate about what you want to do, or you are highly driven by the desire for more money, a bigger house, or whatever, then you are unlikely to stick at doing what you will need to in order to get established in, or progress within, a career role.
There are lots of routes to getting a better paying job with prospects for progression. Not all require a degree; for many workplaces, it’s just as important to have a solid record of reliability and hard work, so that they know you’re a good bet as a a person worth investing their time in. Look at apprenticeships - my government agency, for instance, takes apprentices at degree or postgrad level for general, specialist and technical roles, and they are all ages and come from all backgrounds. Or if you want to go into a field where a vocational degree is needed, you should look into universities which offer the courses you need.
But for any major change like this, you need drive, and to recognise that it will be hard work before you get your reward. Find the thing that motivates you, and you will find that drive.