Drupal 8.x

Hi, working on drupal 8.8.1 I found some articles about making a Mega Menu on drupal 8 with the use of the Layout builder, is there a tutorial somewhere how to do that.

I did make a menu (mainly with the normal menu system) but I didn't succeed in making it collapsable and the articles I did find aren't of any help.

On my production site (drupal 7) I used TB mega menu but that is not possible on drupal 8 as far as I Know and I do need a Menu where I can add images to the menu link see www.redcaps.nl Teams for what i need.

Hey! So I'm basically just trying to change the login form and register form labels to instead say Email address instead of Username or email address and Full Name instead of Username. Any thoughts on what I could be doing wrong? I don't see any changes at all, but I know it's being called because the form id's print. 

<?php

/**
* @file
* Task 1 - only ask for email address and change username label to Full Name
*/

Hey! I'm extremely new to Drupal development and have the following code:

kay_user.module:

<?php

/**
* @file
* Task 1 - only ask for email address and change username label to Full Name
*/

use Drupal\Core\Form\FormStateInterface;

I am unable to update the Drupal core from 8.7.3 to the current latest version 8.8.1.

It's an older site that isn't using composer, so I run the update using:

drush -y up drupal

And I get this error:

Update information last refreshed: Mar, 12/31/2019 - 08:35
Name Installed Version Proposed version Message          
Drupal 8.7.3       8.8.1      SECURITY UPDATE available

Is there a module (preferably for D8) that allows you to create a Checkbox field?  So you could create a field, there would be a checkbox which could be toggled on or off, and the state of the checkbox would save with the node.  AJAX state change for the toggle would be even better.

Let me know of anything you think may work, thanks!