Yes @mitsufisher, the examples in our previous post illustrate how you can customize your effective leverage.
To trade without leverage is equivalent to trading with an effective leverage of 1:1.
Therefore, to trade one standard lot (100,000 currency units or 100K) of USD/JPY without leverage would require you to have an account balance of $100,000.
To trade one mini lot (10,000 units or 10K) of USD/JPY without leverage would require you to have a balance of $10,000. To trade one micro lot (1,000 units or 1K) of USD/JPY without leverage would require you to have $1000 in your account.
Since everyone’s financial situation and risk appetite is different, only you can make this determination in your own best interest. You mentioned in another post how you are practicing on a demo account, and that’s good. Demo account practice will help you develop an understanding of how your account balance can fluctuate based on different levels of leverage before you risk real money.