How do I make a command pod for ksp?

[Sky Kerman]

Also I would be nice to know how to make a part in general. 

[wasml]

I would recommend browsing the add-on sub forums. Look in the sticky's at the top of the sub sub forum's - some tutorials in there - old but still mostly applicable (except for wheels). but the basic (many details missing) process is:

1) Create your model - Blender is the most used but there are also Wings 3D and others. 24 sided cylinders with 12 sided collision meshes are  standard for things like fuel tanks

2) Unwrap the model and create the textures

3) Export the model to a format Unity can handle - there is also a Blender direct to .mu (in-game file type) but I haven't used it so can't speak to it

4) Import model and textures into Unity - add materials, setup collision meshes, setup animations, etc.

5)Export from Unity to your Dev GameData folder using the PartTools Unity package from Squad - will write a .mu file (the model) and textures

6) Create a config file for the part.

Lots of details missing - see above mentioned tutorials. Can be rather frustrating at first as lots of ways for things to not work but is a real thrill when you get your first part in game. I would suggest you start with a simple fuel tank at first to get familiar with the process. As you run into roadblocks check the add-on forum's - someone's probably had the same issue before. If you can't find an answer ask - lots of helpful people here.