You can install Pantheon by:
To run a single node to connect the Ethereum mainnet or a public testnet, running from the Pantheon docker image is the fastest way to get started.
Disk Space and RAM Requirements
Your computer should have at least 4 GB RAM if running a private network, and 8GB of RAM if running mainnet or a public test network.
Disk space needed varies depending on the network on which you run nodes. A small test network might require 200 MB while a mainnet node might require 1.5TB. If syncing a node on mainnet, allow 1.5 TB to 2 TB for the full blockchain archive.