This will cover most tings to get you started and messing around. Note: this was made before the F10/F11 world editor was changed, but it's a start:
cool, very important tip here. If you see someone post an image of a mod but you can not find it anywhere, ask politely. Also, always read the title of the thread. if it says WIP, do not ask for it because (i assume you know this) WIP stands for work in progress