Hi! I would only take classes that are state-approved in Wisconsin. You can try to find a CNA program that is offered during the night and weekends only -- would that work with your schedule? As far as I know online classes must offer on-site clinicals, which are actual hands-on experiences with patients to teach you the skills you need. For a complete list of state-approved CNA courses you can look at
http://www.cnatips.com under CNA Training Classes and pick your state from the map they have there. Only programs that are approved by Wisconsin state will be shown so you are safe regardless of what course you choose. Good luck to you!