@Lianne ******
The easiest way imo is to apply for a 90 days Non-O based on marriage in Thailand,then apply for a 1 year extension. But you need 400k baht in a Thai bank account or 40k/month in monthly deposits. You can then work,you just need a work permit.But, you as a foreigner is not officially allowed to work in a Thai restaurant, if that's what you're going for. As a manager/owner maybe,but you can still not do anything in the restaurant, just basically give orders.