New to Jellyfin and need some advice

[Stig Engdal]

Dashboard > Users > Select User and just change the name in the checkbox, save.

I can't speak for the official tizen client vs what you used.  But I generally recommend using some external smart tv box over any TVs built in smart OS.

I like my Chromecast with Google TV 4K.  A lot of people like their Rokus.  I would get the Roku Ultra if I were to get one.

I ment on this forum