Hello,
1/ I can’t check your site, one more password is required – https://prnt.sc/6PBRVOvemFdT
2/ Theme Options > General > Enable Classic Widgets Panel > On, then go to Apearance > Widgets > Min sidebar area
3/ https://www.wpbeginner.com/wp-tutorials/how-to-completely-disable-comments-in-wordpress/
Regards