You are doing everything right but this piece of sh** is not working.
Despite all the wrong info on the site I have managed to run shell start up script.... but Flirc is still disconnected.
Device is not recognized from Flirc or flirc_util.
So don`t bother with Flirc I have lost 4h on setting it up and I have nothing to show.
And I am not linux noob....
Also as there is no user support from Flirc and real interest for linux OS support.
As I see it this is dead project, last update was in early 2020-02-03 http://apt.flirc.tv/arch/x86_64/
This guy just don`t care and is ripping of people on old "glory" brand.