Module development and code questions

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;

Hi everyone,

I'm new to the Drupal community with almost no experience from it, recently I got one project done in Drupal 7.x and I'm having some issues with geofiled distance.

The app is listing some stores and it should show you the distance between you and that shop, field is called field_geofield_distance but it always returns 0. We have valid Google geolocation API key, location is allowed and the site is running under PHP 5.6(doesn't work at all on higher versions).

I would appreciate if someone can help me were to look an what to do with this.

Hi,
I'm creating a site on Drupal for the first time
I'm using Layout Builder to display news. I add a title block, but it displays as span:
<div class = "content">
       <span class = "field field - name-title field - type-string field - label-visually_hidden"> Title 1 </span>
     </ div>

how to change it to h1?

Thank you.
ps. sorry for my English

Hello,

I have a question. I would appreciate your answer.

How should I provide data to my service correctly? For example in submitForm:

$this->session->set('var1', $name);
$this->session->set('var2', $count);
$form_state->setRedirect('test.task');

Then I have service where I want access the data from session and save in database. Should I read data from session in controller and pass to service by parameter? I guess no but I don't have any other idea. Regards :)

Dear community

I need some help understading why my website is slow (TTFB), I have installed devel module and I can see that for some reason the semaphore table takes a lot of time deleting/inserting records. As I understand this is part of Drupal core but why is it that slow ? 

What can I do to sort this out ?