What are the visa & residency requirements in Angola?

"To visit Angola, foreigners must first acquire a visa. As of June 2019, the application process requires an online form to be filled in, followed by payment of the visa fee and uploading of relevant documentation. This includes an application form, a copy of a valid passport, proof of previous travel within the Schengen Area, and two passport sized photos. After the application is submitted, the documents are verified and the decision on the visa application may take up to 60 days. To apply for residency in Angola, applicants must first register at one of the country’s Inmigration and Passports Offices. The application process includes submission of various documents such as a valid passport, a marriage certificate (if applicable), a doctor’s certificate, a certificate of good health, proof of financial support, employment contract, and others if necessary. As of June 2019, the residency application process is expected to take from six months to one year," mentioned another expat when asked about moving to Angola.