Open a clinic. That good clinical experience. You could also become a doctor.
A lot of the other good ways to get clinical experience requires getting a job, not just volunteering. Contact local hospitals, there are lots of different tech positions that they have, witch will include different amounts of training. Getting your EMT-B and working on a box, or as an er tech is also a great way to go. Some ERs also have scribes, who basically just fallow around the doc all day, I'm pretty sure they don't require any training, which seems to make this a good way to go since you basically get paid to shadow...