Forgive me in advance if I share any advice that you already know or that is completely wrong or utterly useless.
From discussions with friends who are disability advocates, I know that many counties, states or provinces will have a disability board that provides services at no cost or reduced fee. Community transportation to the grocery store and physician appointments is a common service. Sometimes they provide services to speak to a counselor or therapist. If you feel that might help, I would contact them to find out what’s available including Skype and phone sessions. (I don’t know you, so I offer it up as possible resource rather than as a recommendation.)
In dealing with the stresses of the pandemic, having a set routine seems to help many people versus
-getting up whenever,
-finally getting dressed in the late afternoon,
-staying up later and later.
Getting some form of exercise every day is incredibly helpful, even if it’s a short walk around the block when it’s safe to do so: or around your home if it’s not.
I don’t think having a routine or regular exercise will eliminate the loneliness, but it could help in managing it—emphasis on “could.”
My last suggestion is to spend time every day journaling, whether in a notebook or on the computer. Your mind can engage in an endless cycle called “perseveration” where you think about something upsetting and can’t stop thinking about it even though you’re just repeating the same thoughts over and over. Taking twenty minutes to just write or type uncensored can allow those thoughts to leave your brain: it’s like venting to someone else.
Again, I make no guarantees that doing these things will be a magic cure for loneliness. But what I do know is that they’re unlikely to make things worse.