I can guess that you got the brain-dead idea from the stereotype of an LFA. It's inaccurate. Autistics are not basically brain-dead.
Dunno what MJ is. What you describe could be autism. Seems likely. However, I suspect that your bigger problem may be depression; I think you'll do better once that's under control. It seems likely that you've given up on acting NT, for some reason; it may be depression or hopelessness, or you may be giving yourself permission to not keep doing things that were always beyond what you could truly sustain. The course of action will be different for each, but they share rough similarities.
For either, you will need to attempt to evaluate (this will be more difficult if you're depressed) what you want in life and what you're capable of. Stuff like, do you want friends? If so, how many? Do you think you'll ever be able to mimic NT facial expressions? If so, is it worth doing?
If you're depressed, you need to treat the depression, and you need to look for a way to achieve what you want to achieve with the abilities you have, which may change as your depression lessens-- you may become able to do more difficult things as you gain more energy, and less able to do some other things due to side-effects of any drugs you decide to take, if you take any. So you'll want to re-evaluate two or three months into recovery and adjust your plan of action if necessary.
Whereas if you've simply let go of things that were always too much, you need to evaluate which if any you think you really, really want back, and decide what you'll sacrifice to regain them, because that's what it comes down to. If this is the situation, you'll never be able to juggle that much again, and were only doing so by dint of superhuman willpower and "borrowing against tomorrow" (using strength you intend to regain later, sort of like taking out a loan, but in this case you have no income and you'll never be able to pay it back). Good job, I guess, if this is the case. You'll have to think carefully about precisely what you want, and why you want it; beware especially of things you think you want, but actually don't. And you evaluate what you can actually sustain; it'll be less than previously. And figure out how to get what you want with what you have. Basically, if this is it, the way it works is kind of like when you run really far, and you're really exhausted, but you can keep going until you stop, at which point you can't start up again.
If it's both, the good news is, you're in better shape than if it's the latter alone. The bad news is, you have to re-evaluate your life and yourself, AND you need to get your depression treated.
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I'm using a non-verbal right now. I wish you could see it. --dyingofpoetry
NOT A DOCTOR