in your maintenance.php
  <form action="ArtworkAddForm.php" method="get">
  <br><br>
  <h1>Artwork </h1>
  <b><i>Add</i></b><br>
  Name: <input type="text" name="name"><br>
  Date: <input type="text" name="date">  <br>
  Dimensions: <input type="text" name="dimensions"><br>
  Genre: <input type="text" name="genre"><br>
  Location: <input type="text" name="location"><br>
  Colours: <input type="text" name="colours"><br>
  Price: <input type="text" name="price"><br>
  <br>
  <input type="submit" value="Add Artwork" style="font-family: 'Abel', sans-serif; font-size:20px;padding:2px; border:3px black">
</form><br>

ArtworkAddForm.php

<?php
$servername = "localhost";
$username = "root";
$password = "secret";
$dbname = "630a2i2";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
   die("Connection failed: " . $conn->connect_error);
}

$name = $_GET['name'];
$date = $_GET['dateOfBirthDeath'];
$placesLived = $_GET['placesLived'];
$genre = $_GET['genre'];
$famousWorks = $_GET['famousWorks'];

$sql = "INSERT INTO artistTable (artistName, dateOfBirthDeath, placesLived, genre, famousWorks)
VALUES ('$name', '$date', '$placesLived', '$genre', '$famousWorks')";


if ($conn->query($sql) === TRUE) {
  echo "New record added successfully";
} else {
   echo "Error: " . $sql . "<br>" . $conn->error;
}
?>