Hi naydee! Congrats on passing your exam! I applied to every LTC facility and hospital within 20 miles just in case I couldn't find anything. Luckily I got several acceptances so I had my choices. I didn't have any experience other than clinical (I recommend putting it as "experience" on your resume!) and landed a job as a post-surgical CNA/PCA at a smaller community hospital.
Personally, my floor is ALWAYS looking for people to work weekends because most people prefer not to. I think you should be able to land a job with this requirement. Just be flexible with what shift you are available. NOCs (nights) are usually less preferable so there are more openings for those shifts.
I don't think you need to get CPR certified first unless you find that you aren't getting many calls back. My facility paid for my CPR certification and saved me about $85. Once again I don't think volunteering is necessary but if you have trouble finding a job, give it a whirl. The only downside is since you are certified now, some hospitals may not allow you to volunteer because they do not want you accidentally doing tasks outside your description.
Good luck! If you want more information, search the CNA section for threads that involve jobs in your area. This should give you a better idea of how difficult the job search will be since it can vary greatly from area to area.