Volunteer work in Dharamsala would probably come down to teaching English and computers. Do not expect any gratitude for teaching English for free. Your students are not interested in your professional efforts, but will press you to give them (large quantities of) money, plane tickets, visa and passports. Monks in robes, without robes, ex-monks and other men will pursue you and propose marriage. They don't like us, but want a meal and plane ticket and a green card.