1. Open your Zoom.app window.
2. Open Automator
3. Select Create new Workflow or Create new Action
4. Press RED button. This will activate Automator recording window of all your following manual actions.
5. Accomplish manually 4 actions you described in the question.
6. Close Automator recording window
7. Drag written by Automator actions down to code area. One by one. This will show you its scripts. Remains copying the useful content from the script generated by the Automator. And cleaning the external quotes and escapes.

For example: I wrote using the Automator my click action on the current webpage.

Here is generated Automator code:

on run {input, parameters}
    -- Mouse Clicked
    delay 7.956482
    set timeoutSeconds to 2.000000
    set uiScript to "click group 1 of list 2 of group 8 of UI Element 1 of scroll area 1 of group 1 of group 1 of tab group 1 of splitter group 1 of window \"javascript - Toggle Audio-Output On/Off within Zoom Meetings (MacOS) - Stack Overflow\" of application process \"Safari\""
    my doWithTimeout( uiScript, timeoutSeconds )
    return input
end run

on doWithTimeout(uiScript, timeoutSeconds)
    set endDate to (current date) + timeoutSeconds
    repeat
        try
            run script "tell application \"System Events\"
" & uiScript & "
end tell"
            exit repeat
        on error errorMessage
            if ((current date) > endDate) then
                error "Can not " & uiScript
            end if
        end try
    end repeat
end doWithTimeout

I take from the script above only this useful content. As you can see I grab only the correct UI action (the value of uiScript variable) :

tell application "System Events" to tell application process "Safari"
    set frontmost to true -- required
    click group 1 of list 2 of group 8 of UI element 1 of scroll area 1 of group 1 of group 1 of tab group 1 of splitter group 1 of window "javascript - Toggle Audio-Output On/Off within Zoom Meetings (MacOS) - Stack Overflow"
end tell