Drupal 8.x

i have created a module.
in my module i have created a form. Form submits data successfully in database.
i am getting data from database in a controller file. till that point everything is working fine.
Now i want to display data in my twig file.
How it is possible to display data from database in a twig file.?

What theme do you recommend for creating sub-theme (I prefer simple css or less)? Im not very experienced, I know css, less, html, basic js. I use grunt. I'm using bootstrap at the moment but don't use its functionalities so there is no point using BS and it has a lot of code that makes my work complicated. I want to make simple website, gallery, info, contact, news etc. If possible i'm looking for a responsive theme that won't be deprecated in future Drupal versions.

I'm trying to get composer to apply the following patch to core: https://www.drupal.org/files/issues/2019-05-29/2877994-140.patch

I've successfully applied patches for modules, but when I add the following to my composer file, nothing happens (tried running composer install, composer update, composer update --lock). I don't get an error, I don't get anything. 

My composer patch looks like:

Hello,

So I have a multi-step webform which is used to serve quiz questions to the user. When the user selects right answer I am storing that value in the jquery, but the issue is the value gets reset after the page is reloaded because it is a multi-step form, so can anyone help me on how to get the proper count of how many questions user has answered correctly.

Thanking in advance.

hello im migrating old web to drupal i have got user data in csv file

my migration .yml