Heya

Do they have any good groups locally for you? Like just wellbeing or mental health social groups? If you search it online, maybe they will exist. They can be a bit stressful to attend the first meetings, but it can help you make friends. It can be a relief to be around other people who are schizo-effective and who actually understand what you have to deal with.
Groups like that, they can be a great reason to get out of the house, and to sleep better so that you wake up on time. Maybe that sounds silly, but for me personally it is helpful sometimes.
Always remember, you are not completely alone, there are lots of us like this, and we feel the same difficulty interacting with our families and other people. And it always can be helped, even if it feels really annoying and bad. We can feel very isolated in society, but really, there are a lot of us.
Family stuff is complicated, I'm sorry it is making you feel bad. When our family is not well educated about schizphrenia and psychosis, it can be a lot of work for us.
Definitely it sounds as though loneliness is a big thing for you, that is natural with this condition, not a problem about you yourself, so don't worry. Maybe if you talk on this forum, you can see replies from people who also understand, and other places online too.
Definitely though I would say ask your pesky nurse to try and help you find some social groups!