If your described interest in helping others is genuine, some of the volunteer options already mentioned by others are a good initial approach that can permit the "shadowing" experience that you mentioned. Please understand the importance of maturity in caregivers who provide the types of assistance referenced in your post. A wise individual will immediately observe the need for caution in receiving an inexperienced high school student into such situations.

There are; of course, high school students who are mature enough to be terrific helpers in the exact tasks that you have referenced. While "formal" education is indeed an important caregiver qualifier - do not underestimate this fact - it is not an essential prerequisite to being a good caregiver. In fact, many who participate in this forum could testify about highly certified caregivers who were not good caregivers.

If the person being helped is sufficiently knowledgeable in matters pertaining to their care, it is not necessary to have a certification or degree to be a terrific caregiver. In such cases, some of the greatest characteristics of a caregiver are: maturity - high school age being neither a disqualifier nor a guarantee of maturity - integrity, and a desire to help even in unpleasant situations.