I'm a little confused by your question.
As an employee, you could expect the same job duties as a female RN, and those would depend on what position you take. Generally, if you're working in the clinic, you'll be assisting with prenatal care and abortions, post anesthesia, etc. There will be patient education for sure.
Locally, the Planned Parenthood here hires CMAs for their regular appointments (pregnancy tests, STD test and tx, IUD placement, paps--all the GYN stuff) and RNs only for OB and TOP.
As a volunteer, they might have you "working" health fair booths, college and high school events, other community education, etc.
You'd have to contact them to see what's available and the specific duties involved.