O-visa, give you 90days (3months) to enter Thailand, when you land in Thailand you get 90days (3months )when you show your e-visa to immigration control, then on the last month of the visa you can get an extension (one year if you qualify for it),so if you don't show your (o-visa which is not stamped in your passport now ) e,g, e-visa, you'll get a 60days visa exemption stamp, so what did you do at immigration control centre??,,,
Bangkok bank was easy, but may get you with a health insurance at a grand or so ,hard to get just now ,try to get it first thing,as new rules about opening up one now ,you need to start doing the marriage first thing too 400,000 buats in account for 2months for visa extension ,you need an, afamation of freedom to marry,from your embassy, when you get out of the embassy you need to register it ,ministry of internal affairs, with a bit of luck, there might be someone outside the entrance looking to help you get it registered( it takes about
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days to register it )for few hundred bauts, as I did ,in all you have a lot things to do, but in all, well worth it