After upgrading to Version 2, it’s not clear what to do next

Hello!
I’m very disappointed. I managed almost independently to achieve the desired site design in version 1. But when I switched to version 2, I didn’t cope with its configuration at all. For me, it turned out to be completely incomprehensible how to work with shortcodes and the editor of Gutenberg. I just don’t understand how to set up a website. Moreover, it is unclear how to make the homepage https://verni.help/. I miss the fact that it was convenient in version 1. There is no sidebar on the main page. I do not see widgets. See if you can configure https://beta.verni.help in the same way as https://verni.help/?