Below are a couple of general links with which to start and one for Wisconsin.
https://www.fidelity.com/viewpoints/wealth-management/insights/trusts-and-taxes
https://competency.aicpa.org/media_resources/211059-trusts-and-estates-uses-and-tax-considerations/d...
http://wilawlibrary.gov/topics/estate/wills.php#faq
If you can initially employ a professional, that would go a long way toward your understanding of the issues involved and, eventually, you should feel more comfortable doing it yourself (provided the scenario is not overly complex).
