Everything depends on which Embassy you apply at.
Most questions can be answered by thoroughly reading the website of the Thai Embassy you will apply at, which is a lot more trustworthy source than facebook.
Search the group for posts, and include the Embassy name in the search, prioritize posts after
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There is also a manual in the top right corner of the website you apply at,
That practically tell you how to fill in every field, and you can start the application and stop it temporarily if facing doubt, and then late continue from where you left off.
Do not use autocorrection.
Do not translate the application website.
Taking screenshots of every page before continuing, could be helpful.
When the application is completed the make a digital copy of it and all supporting documentation, and keep in your sky, tablet or phone.
Every Thai Embassy process visa applications little different, so without information about which Embassy you apply at, you won’t get right information.
You will get a lot of bonus information by researching and filling out the application yourself, about what is expected of you, during the stay in Thailand.