Time in terms of setting everything up or learning how to use it? Because I can tell you that both are relatively easy. The installation is super easy, no harder than an ordinary Windows setup. The Steam Deck by default uses a desktop environment called KDE, as a Windows user, you should feel right at home. I'd say it's very intuitive to use and easy to learn. As Bazzite tries to mimic the Steam Deck experience as closely as possible, it uses the exact same stuff. Maybe check out this video.