the requirements can change from one day to another. So my recommendation is to wait and see reports until the day you apply. Maybe there will be another better option then than Jakarta.
the same as Ed Visa. You have to enroll in a thai cooking class, muay thai or similar. The schools must provide the documentation to get the DTV visa. There are many information in the Visa related groups
You can check the DTV visa requirements, it can be a good option too. Maybe using soft power option (muay thai, medical treatment, music festival, cooking classes..)