How can I use SwiftData to insert an insert to add to an array and delete at a specified point?

How can I insert the following code into the database to add to an array in SwiftData and delete at the specified point?

struct DataModel: Identifiable, Codable {
    var data: [[String]]
}

struct ContentView: View {
    @State var dataArray: [DataModel] = []
       
    var body: some View {
        VStack {
            Button("Add Data") {
                    dataArray[0].data.append(["Add Data"])
                }
            Button("Add Data1") {
                    dataArray[0].data[0].append(["Add Data1"])
                }
            Button("Remove Data") {
                    dataArray[0].data[0].remove(at: 0)
                }