To build your own Amateur Radio Telescope, you will need a few item to get started.
You will need:
Antenna --> LNA --> Bandpass filter --> Power Injector (Bias Tee) --> SDR Dongle --> PC
Software used can be SDR# or a selection from https://www.rtl-sdr.com/big-list-rtl-sdr-supported-software/ ,
also need to download Radio Eyes to capture a Bell curve like the one below.