How much work do you do with the disorder that you have? You should network within that community would be a great help to you to find funding, support, jobs, meeting women. I know it sounds strange but truthfully you need to embrace that part of who you are fully so it can open a whole other world to you.
I think security is a good way to go and maybe even stay. Might not pay the highest wage, but it's steady and stable depending on where you work you can make a decent wage. You won't be wealthy by any means, but you will have steady work and with effort the ability to make more money.
My uncle has worked security for 20 years. He has health insurance and a 401k. He's not rich but able to support himself.
Also, learn how to save and live within your means. Saving and paying debt on time is more important than anything trying to be a high wage earner at this point. Get an earnings report from Social Security (it's free just go on their website and they'll provide it for you to detail to your wages from the time you started working up until now) it will give you a good idea of your actual earning potential in real time. Set a goal to double that based on the data you get from that report (it will give you a hard look at how much you wage has increased and how long it has taken you to increase by year) within the next 5 years. So$30k should become $60k. Figure out what jobs in the field your in pay that amount. Figure out what gaps there are between you and that job. Fill those gaps and then apply for those jobs once you do.
Ask yourself the question, how much money do you need to make to feel like a success? What is that real life number (it's different for everyone). Write that number down and look at it often. Set a time line to reach it. Figure out what position within the field you've chosen you need to make that money. Ask yourself if you got it in you to be the person who has that job. If that answer is no, proceed, if not, figure out how to make up for the shortfall some other way (side hustle, 2nd stream of income, etc.)
As far as getting married and kids, that just takes a realistic look at yourself, your values, and your likes and dislikes. Take race off the table. Take other superficial things off the table. Build your ability to handle rejection, date online, tell other people you're looking to find someone, participate in singles events in your area.
And get a therapist or at least join a support group (see above about sickle cell they might have a good one). It's hard to change your life on your own. Don't expect yourself to be able to handle every burden solo. Get some help.
Never give up!