Hello ! Thanks for playing my game !
Tank Farm is a propellant store. Now that you mention it maybe it is poorly named, I have to think about that.
Basicly you load the capsule to lifter, add the crew, and press launch/authorize (when the pad is ready - it takes a while after a launch)
Also, there should be a Core at tare before the crew can go. The core builds itself. Other modules need engineers to build them.
Maybe I should add a playthrough video, the game is kind of cryptic.
If you follow the ledger, you should be good to go.