Drupal 8.x

Is there a way to directly (instead of indirectly by first clicking on the layout tab) edit the custom blocks of a node's custom layout?  Like oldschool contextual links?  I'm surprised that doesn't seem to exist with core, and also surprised I haven't found a contrib module for it.  It would be great if from a node's view page (instead of the node's layout page) we could simply click a little admin link to edit the custom block.  I'm sure (or assume) this is somehow possible...

I am trying to update my drupal 8.6.15 site with composer update. And it does not work appropriately

My composer.json file:

I have created a small module (Drupal 8) to display an "Agree to Terms" link in the Drupal Commerce shopping tunnel.
This link displays the store's condition page.
I want to display the rendered store entity instead of the conditions page. How to do this ?
I created in my type of store, a display named "Terms and conditions". I want to make this display in a modal window when the user clicks on the link.

Here is my code :

Hello i want to create a custom content type page template only for one node i already have custom page template but from that template i want to add additional stuff for that i need custom template

I have my content type "news" now i have one news (node id = 452) for that i need different styling and script

I am really lost, and need some guidance.

Drupal is capable of doing something, that I want to leverage/exploit. 

But I can't figure out how to access this component in an isolated manner, everything seems to be deeply entangled, and every class I find that does what I need, requires 5 container classes and injections and dependencies...

So I'm out here asking to see if someone can help, before I need to literally read thru the entire code base to figure it out.

I have been working on a solution that would allow training courses to be created using Drupal as the backbone. I have elected not to use the "Courses" module and am simply using custom content types.

At this point I have the following:

Course Content Type -> which contains entity references (1 or more) to Slide Content Types -> which contain Entity references (1 or more) -> to Text or Media content (these are also custom content types). I chose not to use Paragraphs for a few reasons.