Hello, wise and kind people! Mostly total Swift/SwiftUI noob here (have some python experience - very different!), though I've worked through Paul's SwiftUI iDine tutorial. Wanting to level up my skills through practice, and build myself a simple practice app, but can't seem to solve the above, fairly opaque, error. I'm trying to build a simple calendar date object overlaying a date on a photo, and just set (for the moment) the date overlay to today's date. Styling not done yet, obvi. Here's my code, in the SwiftUI view object. What am I doing wrong? Have tried various versions of return types, various places declaring the function, and trying various unwrapping/coalescing options at the various declarations/assignments and can't seem to find anything that works. Thank you!

struct CalendarDay: View {

    var body: some View {
        ZStack() {
            Image(systemName: "photo")
                .resizable()
                .aspectRatio(contentMode: .fit)
                .background(Color.gray)
                .foregroundColor(Color.black)
                .cornerRadius(40)
            Text(getTodayDate())
                .font(.headline)
            }
        }
        func getTodayDate() -> Any?
        {
            let now = Date()
            let calendar = Calendar.current
            let components = calendar.dateComponents([.day], from: now)
            return components.day

        }
    }

struct CalendarDay_Previews: PreviewProvider {
    static var previews: some View {
        CalendarDay()
    }
}