I would start by getting a guide book for your state and nearest neighboring states (anywhere you would reasonably drive to). In the PNW we have the Falcon guide books and the Gem Trails. I'm not sure what you have in Kansas but found this book on Amazon: https://www.amazon.com/Rockhounding-Kansas-Book-Collecting-Enthusiast/dp/B0B7XHNVKJ
Books like that should give you some basic beginner locations to go to. Some locations will be creeks you walk/kayak in and pick rocks along the way, others will be dig sites you need to bring shovels and picks to, others may be owned and allow you to come pick through their material in various ways.
The other great thing to do is join your local rockhounding club. They will likely have field trips you can join and will be full of veterans that can help you get started.