Question: I installed rustup with brew command but still says that rustup command is not found. I am not sure if I am missing any installation step. Any help would be appreciated.

Answer: 
To configure your current shell, run

```
source $HOME/.cargo/env 

```

this command FINALLY completed the painful installation of Rust.
Did you try to install rustup via <https://rustup.rs/>

That may work correctly on your computer.