work <10hrs/week and take one class to update my skills (and do a complete career change to something more fibro-friendly) .already receiving some social services, time constraints since my savings is nearly gone. I simply need to earn my own way or live on the streets. I hit a wall. I only have a few good hours of brain power per day. It's always one step forward, two steps back. I'm very discouraged even trying to imagine working 40, or even 30 hours per week! So, how do you work a full-time job and support yourself when your mind shuts down after a few hours?!
Sounds like trying to fit a square peg into a round hole.
But I spose it's about grey (= increasing what's possible) instead of black (= streets) and white (= full-time). Good that you're getting social services for support.
In home office I can manage my brain fog (plus Ache & physical fatigue) better than I could if I had to go to work, because all the social stuff there would (eu)stress & distract me from self-care.
That said, I'm wondering what exactly it feels like when your mind "shuts down", maybe that'd give a clue. And if it's really one step forward and two steps back, rather than the other way round, it sounds like only a pretty radical change of your previous strategy can help, because you'd be going backwards.
Similar to cookiebaker's first suggestion:
First and foremost, like the self-care for physical fatigue, my self-care for mental fatigue = fibro-fog means pacing: taking breaks in time and task-switching. Regular "short" stints increases the total amount.
I assume working on a resumé and class assignments is something you can steer? For example if you say your concentration is only good for 2 hours, so-so for the 3rd, I'd keep the first stint down to an hour, then at least a half hour break before you do the 2nd hour, then the 3rd hour could be more concentrated and you might manage a 4th or even 5th hour too. I'd track your times and concentration maybe with an alarm. You could vary the work, e.g. down to 30 or 20 mins and the break times accordingly. I'd aim on never going
Secondly, I'd increase your mental energy by focusing on improving sleep. There's so much to say there that I'd prefer to ask first how your sleep is and what you'd want to improve about it.
Third, I'd try the supps for brain fog I'd already suggested to you
here, if you haven't already.
Fourth, brain fog is often similar to ADHD, so we can use techniques and strategies from there, see
here. One of them is clearer structuring, like I've done here by putting big numbers up front.
Fifth, since your situation is tough you may be getting stress and anxiety increasing brain fog, a vicious circle, so it'd then be important to target these similarly with sleep, supps & relaxation methods. Imagining full-time work is a mountain for you at the moment. Best eat the elephant one bite at a time.
Sixth, as regards additional puzzles to keep the brain active: What I'm working on is enough of a puzzle, any additional ones would put more of a strain on me personally. But I'd try to identify some of what I'm working on as a pleasant puzzle, to do when it's getting tough, that'd be one kind of task-switching I meant above in #1. Another would be to do completely different things, but also necessary, in breaks.