It's interesting to me how many different definitions there can be for things like "executive functioning." For example,
I know Executive Dysfunction as: there are different parts of your brain responsible for wanting to do a thing, knowing how to do the thing, and actually pressing the start button and doing the thing, and having problems with executive function means the part of your brain responsible for actually doing the thing just sits there and goes "nah, I'm not gonna," no matter how much you want to do it and know how. It can mean inability to do household chores or perform basic hygiene, inability to get work done for work or school, or even if you stop walking at a crosswalk and the light turns green, you might find yourself unable to start moving again. Clearly this is quite different than the trouble you're having, so thanks for defining your terms.
Sounds like you're dealing with a lot of things at once and honestly, you should be proud of yourself for keeping it together as well as you do. I knew someone once with DID who had a lot of problems because her different personalities didn't get along and would actively try to sabotage each other. Eventually she found a doctor who managed to help her find ways to stop herself from switching personalities (along with the help of medication) and she was getting back in control of her life. But everyone is really different when it comes to these types of issues. There are a lot of different things that can happen in your situation, and it's hard to give any concrete advice without knowing a lot of specifics. I would say that trying to achieve your goals will be very dependent on specifically what the goals are. I don't know that there's any broad, general advice that would be particularly useful to you. If you are okay with providing more detailed information, maybe I or others could try to give specific advice relevant to the situation, but of course I understand it's not fun to air all your dirty laundry online for the world to see.
The one piece of advice I gave that girl I knew that she told me was actually helpful was to start keeping a journal. Four out of her five personalities were completely unaware of each other until forced to learn about each other by a doctor, and they did not share any memories. The fifth (which was not her main one) had the memories of all the others (and unfortunately also hated the others and was always trying to mess up their lives). Over time, by talking to her various sides, we managed to agree that it would be beneficial to start keeping a journal every day, so that whoever wasn't around during that time could get the cliff notes on what had happened while they were away. It was difficult to maintain due to the unpredictability of the changes, but every little bit helped. If you have this issue, of not having access to all your memories, something like this might be useful to you. In fact, writing in general can be a good way for the various "fragments" to communicate, since they presumably can't speak face to face to work out problems and come to an agreement on how to proceed in life. If you all can manage to find a compromise, it will be to everyone's benefit. If everyone is just doing what they feel like whenever they're out, then every time they come out they'll find themselves working against each other. However many of you there are, you have to share a body, so if you want to accomplish a goal, you need to agree on what that goal is somehow.
It's an incredibly difficult situation and not one you should have to be in without the care of a good doctor. I'm actually surprised to hear you can't see a doctor in America right now. I was there for a couple of months and I managed to get completely free health care because I didn't have any money. That health care should include at least some degree of psych care. Do you really not have access to any at all? Have you looked into options? Or is it that you only have the option of one particular doctor which you don't like, or something like that? I don't think you need a therapist so much as a doctor who really specializes in your condition. Many therapists are great at what they do, but many are not, and most do not have experience with DID and related issues. Have you tried contacting a few and asking them about payment options - emphasizing the severity of your situation and your urgent need for assistance? If they are at all good doctors, they will try to help you find a way to afford it.