WANT TO GAIN INDONESIAN NATIONALITY

From Wikipedia

Obtaining Indonesian citizenship

A foreign citizen can apply to become an Indonesian citizen with the following requirements:
being the age of 18 years or older, or being married
when applying, having resided in Indonesian for a minimum of 5 consecutive years or 10 non consecutive years
physically and mentally healthy
can speak the Indonesian language and acknowledge Pancasila and Undang-Undang Dasar Negara Republik Indonesia Tahun 1945
never convicted of a crime for which the punishment is imprisonment for one year or more
if having Indonesian citizenship will not give the person dual citizenship
employed or have fixed income
pay the citizenship fee

Any application for citizenship is granted by the President of Indonesia.

You have to have been resident here legally for a minimum of 5 years (Unbroken) or 10 years (if you've been out of the country)
If so, I'll post more.

Ah, a quick look at your profile says you have never visited Indonesia, nor have any special skills that are in short supply here.
Your chances of anything past a tourist visa are limited.