AS it is legally not possible yet for forign nationals to fully own lands and properties.

Here are 2 of the easiest alternatives to obtain rights on a land in Indonesia :
1. Having an Indonesian nominee, either an individual or a company.
The land you buy will be on the Indonesian nominee.
It is considered safe for you if you have had some legal deeds written down before a public attorney.
These are :
Power of Attorney giving you the power to transfer, sell, lease the land without any reference from the Indonesian nominee. Also a Statement stating that the money to buy the land belongs to the investor, and not the Indonesian nominee.

2. Forming a PMA company (Foreign Investment Company).
It is the most secure way to buy land or to enter a business in Indonesia. When owning the shares of your PMA company, you can buy land in the name of the PMA company. Building. A house or a residence owned this way by a foreigner shall be: A separate house or an apartment constructed on a piece of land with the right of utilization on state land or controlled on the basis of an agreement with a land title holder;