If you simply doesn’t know how to do it and want to keep it simple i recommend watching this tutorial as i don’t want to script a whole pathfinding system for you. AI Monster Pathfinding -Teddy Horror Game #2 - YouTube
To make something move to a specific part, you would do something like this
local part = workspace.Part
local dummy = workspace.Dummy
--MoveTo makes the dummy walk to the position you put in args
dummy.Humanoid:MoveTo(part.Position)
You should just need to put a server script inside of the dummy. If you copied the script from the link, just use FollowPath(Destination), and set Destination to the Vector3 you want to use.