Not too bad for a first mission Midlothainadair
There's no human side set (even though the min/max player amount is 1), and if it's to be a player vs computer map, theres not triggers for the computer to build units and attack the player. Lastly, theres no triggers to end the mission when the player(s) have won/lost.
Other than that it looks okay. Feel free to ask if you need any assistance.