Are you sure you aren't struggling from depression now, which is leading you to feel unmotivated? I can understand not wanting to do a lot of work in finding something to do as a volunteer, but maybe you can just make a few phone calls.

Do you have any hobbies? Do you like to read? I suggest you look for ways to spend your time doing something you like--maybe even take up a new hobby or sport. And if you have some money and live in a reasonably big town or city, then you can look for community events to go to--such as plays, festivals, etc.

And not to be facetious, but I bet your parents would love to have extra help around the house! You could try your hand at cooking, for one thing. One of my sons is mad at me for not teaching him more about cooking, now that he is on his own.