How to add more vertices on my object (picture examples) The video I'm following has more of those vertices (black dots), on their object and mine doesn't - it is required as I'm about
rip open the object ,and since I don't have more, its impossible to rip where the video is asking.
Apply the subdivision surface modifier. Press Ctrl + A (or use the arrow on the top right) to make the modifier permanent.

Read:
https://blender.stackexchange.com/a/205166/92768
and
How to apply a modifier in V2.9+
But if your &quot;tutorial&quot; doesn't explain those concepts, consider looking at one that explains better. Not all videos are &quot;tutorials&quot;. Some are just not worth your time.