This is the first time I use the terminal on my mac OS. I have followed the instructions so far and restarted Terminal. I tried again making sure I followed every step. That is the reason it says it's already there. The next item I copied and pasted says command not found. Should I delete and start over?
-bash: rustup: command not found
Elizabeths-MacBook-Pro:~ el1748eth$ git clone -b v2.0.0 --depth 1 https://github.com/substrate-developer-hub/substrate-node-template
fatal: destination path 'substrate-node-template' already exists and is not an empty directory.
Elizabeths-MacBook-Pro:~ el1748eth$ cd substrate-node-template/
Elizabeths-MacBook-Pro:substrate-node-template el1748eth$ cargo build
-bash: cargo: command not found
Elizabeths-MacBook-Pro:substrate-node-template el1748eth$