Need a free play tutorial
I was taking some time trying to figure out what tutorial was best and all, but then I realized that it might be the first one. The other tutorials have you face off against AI opponents on an easy mode, but the first one allows you to play without opposition. It will allow you to free play without you worrying about being bought out by your opposition. You could try to figure the game out, try a different mix of buildings, figure out what doesn't work, etc. I haven't seen any other mode where you could do that.
Unfortunately, it doesn't let you play with everything that the game has to offer such as play with colonies of other types, play with off world markets, etc.
What I'm suggesting is that you add another tutorial level where you can play alone, but it has no win conditions. Make everything available. Make it possible to play and learn without any risk of losing.
If you feel up to it, you could also add additional tutorials where you as supposed to achieve something much like how tutorial 1 is about getting a level 5 colony. Maybe make 10 off world shipments, get 1000 food, get 100,000 moneyz without any debt (or very little), produce 10 units of steel for 5 to 10 minutes, get a level 5 colony without getting more than 20,000 debt at any one moment, etc. Make the goals so that you practice skills that you need to play. Or maybe those would best be called challenges.