I'm more concerned that none of the shorts had merit and that you don't know anything about lenses.
$300K a large amount of money and it can go away crazy fast. Whether you are doing shorts or playing around, don't start spending money that you don't consider play money until you know what you are doing... however you get there.
Get the camera that you want to use. Get some good lights. Get things that you will keep and that have long term use and practice, practice, practice.
I'm most concerned that you aren't shooting, playing, experimenting, etc. If you were serious, you would be. Talking about shooting a feature at this point is kinda nuts. Like someone that had three swimming lessons (but nothing of merit) saying they don't want to swim at the pool but they are thinking about swimming the English Channel.