You can't follow the same discipline you apply to a 10$ account with a 10k$ account, also can't with demo account and real account. Because you will have different psychology with each account when you trading. The fact is  that very rare trader can control his psychology. Start with a demo account or a small balance account is good, after that you can trade with larger account but it must be not too large, such as move from $100 account to $500 or $1000 account, do not move from $100 to $10k.