bootstrap slider turn to WordPress theme

Hi everyone

I tried to turn my HTML into WordPress theme, I have bootstrap slider element, each slider has the background image, and I want people can upload the background image, content they want in the customize tool from the homepage.
I saw couple tutorial, but a lot of is fulling post image and content to show up, that’s not what I want. Not sure which wp PHP code can help me that.
Thanks!

Here’s my HTML code

<div class="">
<div class="w-slider-mask">
  <div class="slide w-slide">
    <div class="div-block slider-wrapper">
      <div class="div-block-2">
        <h1 class="heading">start fresh of day</h1>
        <p class="paragraph">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse varius enim in eros elementum tristique. Duis cursus, mi quis viverra ornare, eros dolor interdum nulla, ut commodo diam libero vitae erat. Aenean faucibus nibh et justo
          cursus id rutrum lorem imperdiet. Nunc ut sem vitae risus tristique posuere.</p>
      </div>
    </div>
  </div>

      <!--   slider 2-->
      <div class="slide-2 w-slide">
        <div class="div-block slider-wrapper">
          <div class="div-block-2">
            <h1 class="heading">Deslicious</h1>
            <p class="paragraph">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse varius enim in eros elementum tristique. Duis cursus, mi quis viverra ornare, eros dolor interdum nulla, ut commodo diam libero vitae erat. Aenean faucibus nibh et justo
              cursus id rutrum lorem imperdiet. Nunc ut sem vitae risus tristique posuere.</p>
          </div>
        </div>
      </div>

      <!--  slider 3 -->
      <div class="slide-3 w-slide">
        <div class="div-block slider-wrapper">
          <div class="div-block-2">
            <h1 class="heading">Desert time</h1>
            <p class="paragraph">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse varius enim in eros elementum tristique. Duis cursus, mi quis viverra ornare, eros dolor interdum nulla, ut commodo diam libero vitae erat. Aenean faucibus nibh et justo
              cursus id rutrum lorem imperdiet. Nunc ut sem vitae risus tristique posuere.</p>
          </div>
        </div>
      </div>
  </div>

  </div>

Big thanks!