I have everything, what do I do now? I dont see anything when I play it. I also have no idea how I create custom parts.
As lemni said:
You will need to download the Odin Inspector.
You will need to download Unity 2021.3.1f1.
1. Open up Unity Hub
2. Extract the Modding Toolkit
3. Take the "Modding Toolkit" folder out of the "Spaceflight-Simulator-ModdingToolkit-main" folder.
4. In Unity Hub, click on "Open"
5. Select "Modding Toolkit" from your downloads.
6. Wait for Unity to load.
7. Now inside the Modding Toolkit, click on "Assets" in the top left hand corner.
8. Click on "Import Package" then "Custom Package"
9. Find Odin Inspector, and import the trial.
10. Done! Mod as you wish!
Resources:
Odin Inspector
Unity 2021.3.1f1