Tribute page project stuck

Hello, I finished all steps besides the last one which says to place the image as centered within it’s parent…i tried searching online for a solution, but justifying as centered and aligning it just won’t do… I ran out of ideas, I applied these to both the #image and #img-div…How is this last step supposed to be looking like? Thank you so much for reading my problem ^^

Welcome to the forum.
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this

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<header>

  <link rel="stylesheet" href="styles.css">
  <title id=title>Nicholas Tesla</title>
  </header>
<main id=main>
  <div id=img-div><img src="#" id=image>
<div id=img-caption>dfdf</div>
</div>
  <div id=tribute-info>dfgdsfg</div>
  <a href=https://ro.wikipedia.org/wiki/Nikola_Tesla target=_blank id=tribute-link>fdf</a>
  
  </main>



#img-div{
  display:flex;
 width:100px;
 
}

#image{
  display: block;
  max-width:100%;
justify-content:center;
  height:auto;
  position:center;
 }


these are my html and css codes, i am only stuck on the last mission, i only made it so i have it finished, it is not designed at all

I have solved thiss after all, thank you though