yes you need a court order before you can act as the legal father of a half Thai child. There is no way around it, because the court approved fathership is the only fathership proof Immigration will accept for pupose of applying a Non-Imm-O family visa and the subsequent 1-year Extension of Stay. Alternatively you could marry the mother, and apply for the "Non-Imm-O married to a Thai wife" visa and EOS. Good luck in finding a cheaper option.
yes, and you will need to attend classes. Because Immigration will perform spot checks. They will talk Thai to you to see if you are a genuine language student
be careful, scuba diving offering you a one-year visa is not legal . .they tale your money bribe immigration and you will have trouble in later years to get any visa at all
Dave Fletcher . . . you need to open the E-visa online application. You will be able to apply for the 90-days single entry Non-Imm-O retirement/over 50 visa. Just follow the lead. There is no need to take the Non-Imm-O/A visa. Embassy of Ottawa offers the Non-Imm-O visa! Check their website!