If my location only gets 10/40 satellites, can I improve my setup other than getting antenna higher: 1, get a better antenna, 2: Use a LNA amplifier (something I have used for satellites for ham radio

No this will not help actually.  GEODNET is not like Helium this way. The only way to improve is to improve the installation.  Must have clear sky view. The reason for only 10 satellites Is that you set up must be on balcony or indoors. 10 is not a good amount of satellites.