I think it depends on how many patients you have and the amount of free time before, after and between them. Depending on how you schedule out your day, you can care for your patients and whatever left over time there is, you can judge what extra activities will fit in that time frame.
I'm not a nurse, but I was a Home Health Aide (HHA), I worked for a company and then went independent. With the company I had between 1-3 patients (referred to as clients) per week, sometimes per day. I also was traveling between cities because they were spread out, so that took time out of my day. Usually I took breaks during that travel time. I also took on another part time job at a restaurant. But, I didn't have free time because I wouldn't have anything to do, if I did. While I was working independently, I only had one patient/client and worked 10-12 hours with her. After working, I would go home to pick up my husband and son, then go window shopping.
I don't think that my story helps at all, but hopefully you have an idea of what you can do.