I would urge you to get involved with the Federation on Liberian Youth (FLY). Even organizing a game tournament, mentoring or a reading event will be fine. Also, there are many schools and orphanages that need help, perhaps one hour a day reading or playing games with the kids. Too many expats live in a bubble when they should be interacting with the people they are sent to help.
I am a Ugandan senior hydrogeologist mainly involved in rural and emergency water supply and sanitation intervention. I would love to volunteer in Liberia in an organisation with WASH intervention programs.
I am a British citizen, living in London. I have worked in Liberia for 3 weeks in July 2015 as a civil engineer. Currently I am free and would like to volunteer for any organisation in Liberia.