Hi Charlie,
you have to stand somewhere near and the interaction icon appears. The you have to press the 'F' on the keyboard or in case of using a gamepad press the northern button on the right side.
Hope that helps.
Hi KetDownSquared,
thank you for trying out. I doubled checked the current Beta version and "F" is working. (at least on my Mac)
You are right about the P Key, I will correct that right now. Thanks :-)
I'm sorry we did not correct all the keyboard description on the menu by then.
You are using Beta03 right? (The actual download)
What operating system do you use? Maybe it is not working on Linux / Windows ?
Thanks for helping us making the game better :-)

This is the actual documentation. Thanks again for helping us :-)