Drupal 8.x

I have a D6 site which used tablemanager, a now unmaintained contrib module to present tabular data.  This was very simple data in which a large spreadsheet was processed into about 20 pivot tables to analyze various aspects of the data.  Each of these pivot tables was then uploaded and combined with some text to make a node.  I have been looking for an alternative module and most of the suggestions thus far (contentimport, tablefield, tabular) are not very attractive for one reason or another (much more complicated, no D8 version, not secure, etc.).  So, one of the interesting suggestions

I created a new project with Drupal 8 last version. But when visitors try to register return some page again. I checked all register setting. Everything looks fix. Pls I need to solve this problem. 

I've use a variety of distributions (ie varbase, lightning, etc) that had very nice media image embed that allowed for responsive image control for sizing and other cropping features.

For a number of reasons, I want to start from plain core and build up from there.

I cannot for the life of me figure out the magic combo of modules and configurations that will allow me to insert a media image into an article or page and use the editor to insert the media with those controls.  I CAN get the media inserted using the standard caption/align but that is it.

I cloned the menu by module entity_clone, menu_link_clone main navigation menu and make 3-4 menus but now i want to delete those menu but i cant delete it i cant see the delete option

even if i type manually delete url i cant see anything

/admin/structure/menu/manage/MENUNAME/delete

Please help me

I decided to use Drupal as a work tool that can be consulted and used from any geographical location and, since I don't care (and I don't want) that it is indexed by Google, I would like to know how to make it invisible to Google and to all search engines.
 

Best Regards

I have some irritating visibility options:  contentype, webform, language, contentypes, php, pages, roles and webform again, in this order. So I have contentype and contentypes. Something must be wrong? How can I fix this?