Paper trading is a game

Following a back test, paper trading aids in the forward testing of a strategy. 
When using a new platform, familiarization using paper account is helpful.
Play with a capital sum that is what one would have. Eg play with 20,000 instead of a 1,000,000. The mindset is different.
However, a demo account should not be used for an extended period of time as it lacks the genuine emotion experienced when one's personal money is being used. One would feel like flying real as below

To practice trading skills and mentality, start with a small, affordable to lose account.