Speking of moving somewhere and not knowing anybody, I had to do this as a child when I went to two different hospitals at different times for extended treatment (4 months and 9 months, respectively). I was 8 months old the first time, and was about 60 miles from home. My family was very poor, and I'm not sure how much they were able to visit. I think I disconnected from them emotionally and made attachments to the hospital personnel and my fellow patients. My mom used to tell me I was "standoffish," but, clearly, she did not understand the emotional impact of such an experience at such a young age.
The second time was 2 days after my 7th birthday, and it was 200 or so miles from home. I was very fearful at first, but my fellow patients went out of their way to make me feel welcome.
I'm not as anxious as a "normal" person about making changes. You'll probably adapt quickly and have a not-so-lonely life very quickly. It's not as overwhelming as you think.