I've been using this setup or one similar for several years now and it has worked out very well.
Hardware:
Clearstream TV antenna
Coax cable
Hauppage WinTV-dual HD USB Dual Tuner
Raspberry Pi 4 4GB
1 TB SSD connected via USB 3
HDMI cable
Software:
Libreelec OS
Kodi
TVheadend server
TVheadend client
Debrid addon media streamer
Any questions or comments you can reach me at minnix at minnix dot dev