A YouTube by "Ham Radio Dude" provides a good tutorial on setting up your "Ham Clock" software. Make sure you install Ham Clock at the screen size you intend to use, editing it is not an option. The Inovato Quadra is the device used but the configuration choices are the same for a PI4 also.
Here is the link to the online user manual: https://www.clearskyinstitute.com/ham/HamClock/