I moved into a group home when I was 21. If I had known just what it was going to be like I would have stayed as far away from one as possible. But it would be over a decade before my diagnosis with Asperger's and I had no where else to live. Stuck with 10 other people, most of whom suffered from chronic schizophrenia, with next to no privacy, having to share a bedroom, being told every day when to get up, when to eat, what to eat, when to bathe or shower, and when to do chores. We had to do all kinds of chores every day because with that many people in one house keeping the place clean was something of a miracle. Some of the residents would scream and swear at their hallucinations from their bedrooms. I shared a bedroom with a woman who constantly played music full of swearing and racist, sexist lyrics very loudly. And the germs and viruses that ran rampant all year long. I would get a cold at least every other month. The indoor second-hand smoking didn't help, either. There were residents with really bad bronchitis coughing horribly but they still smoked. In fact the staff practically encouraged them to smoke -indoors- because supposedly the nicotine helps to relieve schizophrenia symptoms.
You're not in control of anything, and I was once told I should be commended for actually living in a group home.
The one good thing about it was that I now had more freedom and independence outside the home because I now lived in the city. The fact that I could come and go whenever I pleased (as long as I let the staff know) is probably what kept me sane. And I only had to stay there for a year. Afterwards I was moved to a home with only two other residents and one staff, and had my room. But my problems didn't end, of course. It didn't help that they were constantly moving people and staff in and out of different homes every year or so, so I'd have to get used to a new location, new house, new everything... and they told me that's how it is and I needed to get over it.
If you're able to live alone or at least one or two other people you actually get along REALLY well with, stay away from group homes.