You can support your favorite charity or charities in a number of ways. For instance, you can:
Volunteer time (even from home). Just about every charitable organization can use volunteers. It doesn't matter what your skill level or how much time you have to devote, or how much you can do physically. In addition to benefitting people with your health condition, volunteering can also help you update, hone, or learn new, skills that can be useful in a work setting.
NOTE: If you consider going on a board of a nonprofit, it is advisable to be sure the organization has Directors and Officers Insurance ("D and O" Policy). D & O" policies cover any "wrongful act" committed as a board member. "Wrongful act" is generally defined to include a breach of duty, neglect, error, misstatement, misleading statement or omission.
Donate money or other assets such as real or personal property (and get a tax benefit).
Do fund raising.
Shop at brick and mortar or internet retailers who give a portion of each sale to a charity.
Each of these subjects are discussed in the articles listed in "To Learn More."