Install it, don’t stress and have fun 😊
I switched someone recently (she installed mint instead of kubuntu that recommended) and soon after exclaimed that it’s just like windows. I think she assumed everything would be in a terminal lol, now she gaming in steam. Anyway you’ll probably find it more similar than different. The one big difference is that we don’t download and run software from the Internet, we have something like an app store where everything is vetted and trustworthy.
I love KDE. It’s got easy to use power user features and is very robust.