Great advice from the others.
In my opinion I would be careful to associate your experiences with just "nursing homes". Every job and occupation has positive and negatives. I have never had a job in any field that didn't have some backstabbing and gossiping going on. I worked as a CNA at a Skilled Nursing Facility for 3 years prior to going to nursing school
and although I wasn't a nurse at the time I can relate to much of what you're feeling. Many facilities are under staffed and overworked, but sadly that's becomming more common in all settings.
As far as how the people are treating you, you cannot change what others may do and say. And you definitely shouldn't listen to just one nurses opinion. Who knows maybe you will meet other employees there that are great. Do everything you can to focus on only what YOU CAN CONTROL. Don't worry about anyone else. Go out of your way to be kind, caring, and show your work ethic. Don't give them any reason to talk bad about you, if they do talk bad about you it will be because they are jealous of the person you are and the person they are not!
Lastly, your work experience. Many people think that because you work in a nursing home that you have no skills, couldn't get a job anywhere else, and are not competent enough to work in a hospital. Anyone that thinks that should not be a nurse or someone working in healthcare. The nursing staff I worked with in my facility were some of the hardest working Nurses and CNAs I have ever seen. You may not be dealing with highly acute patients, but you will become great at assessing, charting, delegating, time management, and most importantly, CARING FOR PATIENTS! I must also reiterate the time management, like you said sometimes you will have 25 patients at a time; after working there for a while you will be a pro at prioritizing, delegating, and managing your time.
I know this may have not been your first pick for working when you first graduated, but get as much out of it as you can. What you learn in your first year of working as a Nurse will be priceless as you move throughout your career. Don't let a few bad apples ruin it for you. You will be busy and you will be stressed. Just focus on what you can control in your life and do your best!