While a very good advice, I don’t completely agree with the last word.
Only fly what you can afford to lose or are willing to accept the fact that you can lose it.
If you lose a ship and are find to work a couple of days to replace it, still an acceptable risk.
Another good tip:
Contact the person that killed you. Ask politely what happened, why it happened and how you can improve. Most will take the time to help you become a better player