Do not use agents, They do not know how the Embassy in your resident country processes visa.
Most people are able to apply themselves, as you are supposed to.
Take control of your future life as a responsible adult.
Search the group for posts, and include the Embassy name in the search, prioritize posts after
****
Most of the questions can be answered by thoroughly reading the website of the Thai Embassy you will apply at, and the manual in the top right corner of the application website, which is a lot more trustworthy source than facebook.