[foreign woman Apply for Non Immigrant O visa in Thailand]

ubonjoe  thank you

[foreign woman Apply for Non Immigrant O visa in Thailand]

Can I apply for a Non Immigrant O visa at an immigration office IN Thailand? I am currently engaged to a Thai man and I know in order to get a marriage visa I need to have a non immigrant O visa (right?). Can I enter Thailand on a tourist visa and then change it to a Non immigrant O visa once we are married? I am getting so confused researching all the requirements and visas. thanks