When the DTV Nomad is approved, how much time do we have to come to Thailand? Is there a time 'validity' before the departure of the country of origin to Thailand until get the stamp when we receive the approval from the embassy?

Any complications if you have applied for a DTV nomad visa and you come to Thailand in the meantime on holiday while waiting for approval? When you get approved while inside of Thailand, how it works? Thanks peeps in advance, much appreciated.

Also what if I am not in my country of residence and on business trip in another country ? When I get the DTV , can I just fly direct to Thailand or should I go back to my country first?