OP probably wont read this but for anyone who wants advice...
You need three things. Experience, education (not just a degree), and good references.
They all tie in together. Your education is what gets you started, but most employers want EXPERIENCE and its hard to find through paid work, so you need to do voluntary work, it doesnt particularly have to be with a human rights group. Volunteer at a homeless shelter, soup kitchen, or you could do voluntary work for other vulnerable people, for example. disabilities, children, elderly. You can also build experience through working for money in care homes and say you have experience in making sure elderly have their human rights when youre around, its a big deal these days with that group.
Join a lobby group for free and campaign, etc.
Then start applying when you have a good years experience and great references from these groups.
I'm applying for a job as a researcher for the human rights bill in northern ireland, but id not be able to without that experience, my degree, and I got the work experience in the simon community for homeless and nursing homes through paid healthcare agency work filling shifts.