This will show you how to make around 700-800 credits per minute near the start of the game.
Easy Credits in Early Game
After you crack your first 10 asteroids as part of the tutorial, you can use the pictured panel to continuously spawn more asteroids and just keep on cracking. Keep going one after the other until you have as much money as you want up to 100,000 credits.
If you crack them in quick succession, you can make between 700-800 credits every minute.
You can also continue to break down ships during the dismantling tutorial as well. But I could only get up to about 200 credits per minute doing that.