To import from China to Indonesia you should find apply import license or hire an import agent for customs clearance, else your goods may pending on the indonesia customs forever.

Once you finished the customs issue, then you can start to order from suppliers on Alibaba based on your goods requirements. You can find tutorials on how to order on Alibaba, how to avoid being cheated on Alibaba etc. From those tutorials you will have a basic ideas what kind of things you need to pay attention, how you negotiate with the sellers.

After that you can make small order or sample order from Alibaba to Indonesia and ship via supplier or courier.