Receive antenna
I checked the internet and found out that the most stable LNB for now (November 2021) is the Bulls Eye. You don't need to change anything, just screw it on the dish and connect some coax to your receiver.
The Bulls Eye is ok for this money. But mine is 19kHz of the freq when it is about +5 degrees Celsius outside. And it stays there as long as the temperature is not changing dramatically. The claim of 10kHz is at 25 degrees !
But it is very useful because you can compensate for this difference in the software, see later on (SDR-Console).
The output of the Bulls Eye is somewhere in the neighborhood of 739 MHz, which is quite high for standard cable, but the good news is that is has a very high gain, so you don't have to be worried about the signal strength after 15 meter cable.