Your best option isn't to try to visit many villages, but to follow your guide to his village and spend a few days with his family. You should share their meals, and share with them everything you might be taking for yourself. Tobacco, tea, coffee, sugar, salt, and rice make for good gifts. Do not promote begging, only give to people you are staying with or who are doing you a service of some kind. Be discrete with your camera.
Jungles vary tremendously from one place to another.
If you want an easy trek, you should consider an elephant excursion in Thailand. The Mentawai jungle is reserved for hardcore trekkers. You need to be in good physical shape. During the rainy season, only strong athletes should challenge the knee to thigh deep mud walking. Your hair will be tangled in branches and the smallest cut will quickly get infected and not heal until you go back to the city.