Creating a search form and displaying results

Im trying to create a plugin for a site where the user can see a table of orders from customers in the Wordpress dashboard, It's a custom db but I'm using the wp-list-table, I've wrecked my brain for hours trying to get the built in search for that working

I want to create a search form where the user can search this table and return the results in a nice little table for them.

This is my code so far for the search form

<form name="search" method="get"> 
    Order Number: <input type="text" name="find" />
    <input type="hidden" name="searching" value="yes" />
    <input type="submit" name="search" value="Search" /> 
</form>



<?php

//This is only displayed if they have submitted the form  
     if ($searching =="yes")  {  
        echo "<h2>Results</h2><p>";   
    //If they did not enter a search term we give them an error  
    if ($find == "")  {  
        echo "<p>Please Enter a search term";  
        exit;  }   

     // filtering 
     $find = strtoupper($find); 
     $find = strip_tags($find);  
     $find = trim ($find); 

     global $wpdb;

     //Now we search for our search term

     $database = $wpdb->get_row("SELECT * FROM storeuserdata2 WHERE orderno = '%$find%'");
     //And we display the results  
     echo "<table>";
        echo "<tr>";
            echo "<td>".$database->firstname."</td>";   
            echo "<td>".$database->lastname."</td>";
            echo "<td>".$database->email."</td>";
            echo "<td>".$database->address."</td>";
            echo "<td>".$database->towncity."</td>";
            echo "<td>".$database->contactnumber."</td>";
        echo "</tr>";
    echo "</table>";

    echo "<b>Searched For:</b> " .$find;  
 }  

This just hangs on a blank page and shows nothing atm. I want to display the results on the same page on the dashboard

I'm still a complete newb when it comes to php and Wordpress dev, so hopefully im just missing something simple