How to move selection based on word outline?

Question

Hello everyone,
I am trying to write a script for adding TAGs as comment into word document. The idea is to add a tag for every heading and sub-heading present in document. The input word documents do not have 'word style' followed. I have following two questions.
1.) How can I extract number of headings based on outline? The document do not use word styles for adding headings or sub-headings. This makes it difficult to use 'outlineLevel' to be used. As if a heading is written in normal text then outlineLevel will
return '10' and script will miss this heading. I read on another forum that outlineNumber can be used but it does not seem to be working with paragraph object.
2.) How to move selection from one heading to next? Currently my script is not able to move selection.
Below is the script I manage to write. (I'm new to scripting and this is my first script)
$filePath = "H:\Desktop\ashishk\F1K\FunctionalSafetyCopy.docx"
$word = New-Object -comobject word.application
$word.visible = $false
$MinDepth = 1
$MaxDepth = 9
$TagPrefix = "TS_FS_"
$TagStart = 1
$TagStep = 1
$TagNew = 0
#Document object
$doc = $word.documents.open($filePath)
$section = $doc.sections.item(1)
$range = $section.Range
$outline = $doc.Paragraphs | ForEach-Object {
if($_.outlineLevel -le $MaxDepth){
Write-Host "outlineLevel:" $_.outlineLevel
if($TagNew -eq 0){
$_.Comments.Add($range, "$TagPrefix$TagStart")
$TagNew = $TagStart + $TagStep
Write-Host "New Tag number:" $TagNew
Else{
$doc.Comments.Add($range, "$TagPrefix$TagNew")
$TagNew = $TagNew + $TagStep
Write-Host "New Tag number:" $TagNew
$doc.save()
$doc.close()
$word.quit()

Answer 1

You will need to get the selection range object and reference it as a range.  If the outline is not really an outline then how would you use it?  I think if you clarify your question it might lead you to seeing an answer.
If it is an outline you should be able to just walk the outline.  Any outline element can have a text (10) section attached. 
I would suggest that you start in the Word Developers forum and try to understand how this would be done in VBA or C# then translate it into PowerShell.
I would also recommend creating this as a callable macro or function in the word doc or a template. You can then just open and call the macro from PowerShell.
¯\_(ツ)_/¯