You have to wait on your USCIS I 130 approval. Then they send your application to NCV where you pay some fees and fill out form DS 260 plus Affidavit of financial support and send them supporting documents that they ask for. Our 130 was approved in August and our interview was in December. There are only 2 options available in Bangkok to have the physical. After approval by the Embassy, she will have 6 months, from date of physical to go to US. If your wife has a 10 year tourist Visa.....it will be canceled. Proof of vaccines are required or she will have to take again. My wife had to take 5. Good luck.