1. You don't actually want to track units. You just think you do, but you don't. You're too new to track units, so don't.
2. You have one chance to make a first impression. Unfortunately, that means you need to be prepared to update your game. Reliably. You need to have a good idea of when the next orders lock will be around the same time you post the update.
3. Formatting is your friend.
4. Does your game have numbers? Use Excel.
5. Write your updates in Word. Save often.
6. Double check your stats before updating. Reread orders. Etc.
7. Just use the Standardized Combat System your first game. Seriously.