Internet issues

I’ve had trouble connecting a computer to my internet. In my efforts, I somehow disconnected my laptop. I went to use a small tv that is a smart tv and no issues with connection but I hadn’t used in awhile, wouldn't connect. While trying to connect I got a message that said WPA3 is not supported. Looking at my settings, I see WPA2, WPA3 Personal and WPA3 Personal Transition. The personal is checked. What should my settings be set at? I tried to change it and it screwed up my TV. My main TV, the office tv are fine but both are on Roku. My phone and tablet both connect with no issues. I’m not sure where to go next.