People here are making some proper suggestions though. Firstly, casting aside large projects like Shattered Stars and starting small with Lost in the Mist was definitely a step in the right direction, even though the "campaign" still came out terrible.
One of the problems people noticed with the mod is that there was a major bug that didn't let you finish the campaign at all. The mission was supposed to end some time after the player is killed, but the player was invulnerable, so unable to be killed. Therefore the mission never ended.
This means you did not play your mod from start to finish before you released it. This is a very big mistake. When you think your mod is finished, you must play through it all before releasing. Without it you don't know if it is playable at all.
Also a thing to notice, the idea of the campaign ending some time after player's death with the player watching some mevents from the death cam view is actually kind of unique.
For now, just complete some FRED tutorial. And then play the mission that you made when following the tutorial.