The MENA Rights Group is an NGO that focuses on defending human rights in the MENA Region, including Libya. They work with the international community and human rights defenders in addressing specific human rights violations, as well as institutions and structures related to humanitarianism. I have thoroughly researched this organization and can confidently say they are effective with what they do, even for being a relatively young organization. I have attached a link to their website, so feel free to check them out!
https://www.menarights.org/en