For example, the IC platform and Jiasheng platform I am using now.
Holding 0.0 1(XAUUSD) is about 3.6 USD, fluctuating 1%, fluctuating about 17 USD.
If you hold 1 lot, the advance payment is about $360, and the fluctuation is about 1% 1700.
If you can buy at most 138 lots on the platform I use, the advance payment is about 49680. If it fluctuates 1%, your profit and loss will be $234600. However, if the fluctuation is basically less than 0.0 1%, it will be forced to close the position.
You can buy 0.0 1 lot first, and then increase it when you are familiar with it.