PowerShell Scripting - From a beginner

Hi folks !

I am starting to get more into PowerShell scripting. I did a small script to grab system and computer information that I find useful. However, I'd like to have some outside thoughts on 

• Function structure
• Is it ok ? 
• Am I on the right path ?

I tested this code on Windows 10 and Windows Server 2012 Standard. It does give output what I want the function to do, therefore, I want to improve my skill and my code structure. 

Thanks for reading !

Steven

# PowerShell v5.1
function Get-SystemInfo {
    # Gather information from computer
    $Computer = Get-WMIObject -Class Win32_ComputerSystem
    $DNSFlag = (Get-WMIObject -Class Win32_ComputerSystem).PartOfDomain
    $Name = $Computer.Name
    $Model = $Computer.Model

    # Gather information from system
    $PSVersion  = $PSVersionTable.PSVersion.ToString()
    $OSInfo     = Get-CimInstance Win32_OperatingSystem
    $OS         = $OSInfo.Caption
    $OSVersion  = $OSInfo.Version
    $InstallOn  = $OSInfo.InstallDate
    $IPv4       = Get-NetIPAddress -AddressFamily 'IPv4' | 
Where-Object {($_.InterfaceAlias -like 'Ethernet*') -OR ($_.InterfaceAlias -like 'Wi*') 
-OR ($_.InterfaceAlias -like 'Local*')} `
                  | Where-Object {$_.IPAddress -notlike '169.254.*'}
    $IP         = $IPv4.IPAddress
    $Interface  = $IPv4.InterfaceAlias

    # Show gathered computer's information
    Write-Host '' # Empty
    Write-Host '' # Empty
    Write-Host "      NAME                : $Name"
    Write-Host "      MODEL               : $Model"
    IF($DNSFlag -match 'True'){
        $Domain = $Computer.Domain
        Write-Host "      DOMAIN              : $Domain"
    }
    Write-Host '' # Empty

    # Show gathered system's information
    Write-Host "      OPERATING SYSTEM    : $OS"
    Write-Host "      VERSION             : $OSVersion"
    Write-Host "      INSTALLED ON        : $InstallOn"
    Write-Host "      POWERSHELL VERSION  : $PSVersion"
    IF ($IP.Count -lt 2){
        Write-Host "" # Empty
        Write-Host "      INTERFACE           : $Interface"
        Write-Host "      IP ADDRESS          : $IP"
        Write-Host "" # Empty
    }
    ELSE{
        For ($i=0;$i -lt $IP.Count;$i++){
            Write-Host "" # Empty
            Write-Host "      INTERFACE           :"$Interface[$i]
            Write-Host "      DESCRIPTION         :"(Get-NetAdapter -Name $Interface[$i]).InterfaceDescription
            Write-Host "      IP ADDRESS          :"$IP[$i]
        }
    }
    Write-Host "" # Empty
}