To change your shop currency settings, go to WooCommerce → Settings → General → Currency Options and fill in the necessary fields.
Currency: select the currency for the prices in your store from the Currency dropdown list.
Currency Position: select whether the currency symbol is placed to the left or right of the price (the available options are: left, right, left with space, right with space).
Thousand Separator: enter the character to use for the thousand separator (a comma, a period, a space, or no separator).
Decimal Separator: enter the character to use for the decimal separator (a period or a comma).
Number of Decimals: select the number of digits to appear after the decimal separator.
If your currency is not listed in the dropdown, you can use WooCommerce tutorial on how to add your own custom currency.
WooCommerce only allows using one base currency at a time. If you want to apply multiple currencies, you can use some special widgets and add-ons, for example:
To learn more about multiple currencies options for WooCommerce, consult their documentation.