Como agregar botón flotante Whatsapp en WordPress, sin plugin + ejemplos

<a class="botonwhatsapp" href="https://api.whatsapp.com/send?phone=34652116272&amp;text=Hi%21%20I%20want%20Information%20" target="_blank" rel="noopener">
  <img src="https://leninmhs.com/wp-content/uploads/2023/12/botonwhatsapp.png">
</a>

<a class="botonwhatsapp" href="https://api.whatsapp.com/send?phone=34652116272&amp;text=Hi%21%20I%20want%20Information%20" target="_blank" rel="noopener">

  <img src="https://leninmhs.com/wp-content/uploads/2023/12/botonwhatsapp.png">

</a>

/** Inicio Boton Whatsapp - Ejemplo 1 **/ 

.botonwhatsapp{ 
  position:fixed; 
  bottom:100px; 
  right:60px; 
  text-align:center; 
  z-index:100; 
} 

.botonwhatsapp:hover { 
  box-shadow: 0px 0px 25px #FF5166; 
  background-color: transparent; 
  border-radius: 55px; 
} 

/** Fin boton whatsapp - Ejemplo 1 **/

/** Inicio Boton Whatsapp - Ejemplo 1 **/ 

​

.botonwhatsapp{ 

  position:fixed; 

  bottom:100px; 

  right:60px; 

  text-align:center; 

  z-index:100; 

} 

​

.botonwhatsapp:hover { 

  box-shadow: 0px 0px 25px #FF5166; 

  background-color: transparent; 

  border-radius: 55px; 

} 

​

/** Fin boton whatsapp - Ejemplo 1 **/

<a class="botonwhatsapp" href="https://api.whatsapp.com/send?phone=34555555555&amp;text=Hi%21%20I%20want%20Information%20 " target="_blank" rel="noopener">Chat with us<br/>
	<i class="fa fa-whatsapp icon-botonwhatsapp"></i>
</a>

<a class="botonwhatsapp" href="https://api.whatsapp.com/send?phone=34555555555&amp;text=Hi%21%20I%20want%20Information%20 " target="_blank" rel="noopener">Chat with us<br/>

    <i class="fa fa-whatsapp icon-botonwhatsapp"></i>

</a>

.botonwhatsapp{
  position:fixed;
  width:80px;
  height:60px;
  bottom:40px;
  right:40px;
  background-color:#D40000;
  color:#000;
  border-radius:5px;
  text-align:center;
  font-size:12px;
  box-shadow: 2px 2px 3px #999;
  z-index:100;
}

.botonwhatsapp:hover {
  text-decoration: none;
  color: #D40000;
  background-color:#000;
}

.icon-botonwhatsapp{
  /*margin-top:16px;*/
  font-size: 30px;
}

.botonwhatsapp{

  position:fixed;

  width:80px;

  height:60px;

  bottom:40px;

  right:40px;

  background-color:#D40000;

  color:#000;

  border-radius:5px;

  text-align:center;

  font-size:12px;

  box-shadow: 2px 2px 3px #999;

  z-index:100;

}

​

.botonwhatsapp:hover {

  text-decoration: none;

  color: #D40000;

  background-color:#000;

}

​

.icon-botonwhatsapp{

  /*margin-top:16px;*/

  font-size: 30px;

}