How to enable customers to select multiple items and send to client

First, I added Gallery Section with 6 images, enter caption

Next, add a Form Block with Email Field + 6 Hidden Fields

Label: Image 1, Image 2,...

Value: leave default

then I added this code to Page Header

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
  $('figure').click(function(){
        $(this).addClass('red-dot');
    })
    $('figure:nth-child(1)').click(function(){
        $('[name="SQF_IMAGE_1"]').attr('value','Yes. I am interested');
    })
     $('figure:nth-child(2)').click(function(){
        $('[name="SQF_IMAGE_2"]').attr('value','Yes. I am interested');
    })
     $('figure:nth-child(3)').click(function(){
        $('[name="SQF_IMAGE_3"]').attr('value','Yes. I am interested');
    })
     $('figure:nth-child(4)').click(function(){
        $('[name="SQF_IMAGE_4"]').attr('value','Yes. I am interested');
    })
     $('figure:nth-child(5)').click(function(){
        $('[name="SQF_IMAGE_5"]').attr('value','Yes. I am interested');
    })
     $('figure:nth-child(6)').click(function(){
        $('[name="SQF_IMAGE_6"]').attr('value','Yes. I am interested');
    })
});
</script>
<style>
.gallery-grid:before {
    margin-bottom: 40px;
    content: "Click on each image. It will add to form. Then enter your email and click Submit";
    display: block;
}
  .red-dot:before {
    content: "";
    background-color: red;
    position: absolute;
    right: 10px;
    top: 10px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    z-index: 99999;
}
figure {
    position: relative;
}
</style>

This code will add red dot

When clicking on image 1, code will change default value of Image 1 to Yes. I am interested

Similar for image 2, 3, 4

This is quite manual, I believe there is a better way with someone good at JavaScript. It can be just a Hidden Field or a single Text/Textarea Field, when someone clicks on the image, the code will add the caption of that image to the Hidden/Text Field. Clicking on the second image will add a second caption, separated by commas and so on.