Calendar Widget Small
This SwiftUI template can be downloaded and opened in DetailsPro on iPhone, iPad, and Mac.
Open in DetailsPro
Start with the Small Calendar widget from iOS 14. This is a great starting point for becoming familiar with horizontal and vertical stacks, which you'll use all the time, and with setting several different text elements with just the right system fonts.
Don't forget to keep that consistent padding around the edges of widgets, and check out the WWDC session that goes over widget design for even more inspiration.