When the game goes live there are supposed to be patrolled sections where you will be able to operate safer but griefers will grief. Buy insurance on your ship and any upgrades you make to it and your cargo. Not all of that is available yet.
Keyboard an mouse are fine but you can use a game pad or joystick.
The game is supposed to be free after you buy the game package.
Tutorials are coming but go to youtube. There are a ton there.
Griefers will grief better to get into combat and leads how to protect yourself.