For becoming a CNA you need to take CNA training. There are regular CNA schools as well as online CNA classes that provide the required training. Here are some techniques that you can consider for online CNA programs.
If you're looking for a well-paying, flexible work at home job, you might look into being a test scorer. There are several companies hiring test scorers. Though some only offer seasonal work, others have options for full-time work. See who is hiring.