Andaman club har re opened for border bounces. It's a lot more expensive now than before COVID. I don't know exact cost but around 2400thb for round trip on speedboat.
You ARE going to need some kind of onward ticket and the 20k cash.
Cooking isn't on the list of prescribed occupations. I'm not 100% sure about the qualification question, but my best guess is that they won't issue a Work Permit unless the candidate has some professional qualification (and probably experience) in that field.
You've applied for a visa yet you're already on some kind of non o 1 year visa ( that doesn't exist, extension maybe) and you've done a 90 day report. ??