Ted here from Shopify, thanks for posting your query!
We are trying to expand Shopify Payments globally, however, it is not available for Indonesian merchants as of yet. Here is a list of locations where Shopify Payments is available. You are more than welcome to create a store with Shopify itself but you would just need to choose a different payment gateway. Here is a list of gateways you can choose from instead (based on your location). 2Checkout and Paypal would be the most common gateways selected from that list as well.
How are you finding the platform so far? If there is anything else I can help you with, please let me know, I'm happy to help!