Update installation instructions (#341)

README.md

@@ -56,7 +56,7 @@ Example:
 curl -fsSL https://fnm.vercel.app/install | bash -s -- --install-dir "./.fnm" --skip-shell
 ```
 
-### Manually (OSX/Linux/Windows)
+### Manually
 
 #### Using Homebrew (OSX)
 
@@ -64,13 +64,23 @@ curl -fsSL https://fnm.vercel.app/install | bash -s -- --install-dir "./.fnm" --
 brew install fnm
 ```
 
+Then, [set up your shell for fnm](#shell-setup)
+
 #### Using Scoop (Windows)
 
 ```bash
 scoop install fnm
 ```
 
-Then apply the changes the installer prints, to set up your shell profile.
+Then, [set up your shell for fnm](#shell-setup)
+
+#### Using Cargo (Linux/Mac/Windows)
+
+```bash
+cargo install fnm
+```
+
+Then, [set up your shell for fnm](#shell-setup)
 
 #### Using a release binary (Linux/Mac/Windows)
 
@@ -78,19 +88,55 @@ Then apply the changes the installer prints, to set up your shell profile.
 - Make it available globally on `PATH` environment variable
 - Configure your shell profile:
 
-  - For **Bash** or **Zsh** users, add the following to your `.bashrc`/`.zshrc` respectively:
+## Completions
+
+fnm ships its completions with the binary:
+
+```
+fnm completions --shell <SHELL>
+```
+
+Where `<SHELL>` can be one of the supported shells:
+
+- `bash`
+- `zsh`
+- `fish`
+- `powershell`
+
+Please follow your shell instructions to install them.
+
+### Shell Setup
+
+fnm needs to run some shell commands before you can start using it.
+This is done by evaluating the output of `fnm env`. Check out the following guides for the shell you use:
+
+#### Bash
+
+add the following to your `.bashrc` profile:
 
 ```bash
 eval "$(fnm env)"
 ```
 
-  - For [**Fish Shell**](https://fishshell.com/) users, create `~/.config/fish/conf.d/fnm.fish` add this line to it:
+#### Zsh
+
+add the following to your `.zshrc` profile:
+
+```zsh
+eval "$(fnm env)"
+```
+
+#### Fish shell
+
+create `~/.config/fish/conf.d/fnm.fish` add this line to it:
 
 ```fish
 fnm env | source
 ```
 
-  - For **PowerShell** users, add the following to the end of your profile file::
+#### PowerShell
+
+add the following to the end of your profile file::
 
 ```powershell
 fnm env --use-on-cd | Out-String | Invoke-Expression
@@ -99,35 +145,14 @@ Then apply the changes the installer prints, to set up your shell profile.
 - On Windows, the profile is located at `~\Documents\PowerShell\Microsoft.PowerShell_profile.ps1`
 - For Mac/Linux, the profile is located at `~/.config/powershell/Microsoft.PowerShell_profile.ps1`
 
-  - For **WinCMD**, aka good old **Windows Command Prompt** or **Batch**, fnm is also supported but is not entirely covered. [You can set up a startup script](https://superuser.com/a/144348) and append the following line:
+#### Windows Command Prompt aka Batch aka WinCMD
 
-    ```
+fnm is also supported but is not entirely covered. [You can set up a startup script](https://superuser.com/a/144348) and append the following line:
-    FOR /f "tokens=*" %i IN ('fnm env --use-on-cd') DO CALL %i
-    ```
 
-#### Using Cargo (Linux/Mac/Windows)
-
-```bash
-cargo install fnm
 ```
-
+FOR /f "tokens=*" %i IN ('fnm env --use-on-cd') DO CALL %i
-## Completions
-
-fnm ships its completions with the binary:
-
-```
-fnm completions --shell <SHELL>
 ```
 
-Where `<SHELL>` can be one of the supported shells:
-
-- `bash`
-- `zsh`
-- `fish`
-- `powershell`
-
-Please follow your shell instructions to install them.
-
 ## Usage
 
 ### Global Options