If you don’t have a remote yet you can also try out the core-simulator (GitHub - unfoldedcircle/core-simulator: Remote-core simulator releases). It’s available as a linux vm that also includes an older release of the remote ui application that simulates the remote itself. Or you could run the simulator via Docker and download the latest remote ui app as a pre compiled linux binary (GitHub - unfoldedcircle/remote-ui: Qt frontend application for Remote Two). macOS is also supported but you have to compile the binary yourself which is not as easy as I found out myself.
Note that UC is also planning to move all frontend applications to “alternative technologies” to improve the user experience (New things in the works