Hey @Klintistwood
You can generate two random numbers for the coordinates (x & y) that are within your boundaries, and use those in the 'Send mouse click' action like so:

Set the randomly generated numbers in "X" and "Y" :

You can define the movement speed from the settings of the "Send mouse click" action:

If you want to randomize this as well, you can generate another random number (lets say for 1 to 4) and then by using conditionals you can add the action with different speed settings.
So for example:
If random number == 1 then run the "Send mouse click" action with a configured mouse movement style set to instant.
else if random number == 2 then run the "Send mouse click" action with a configured mouse movement style set to Low speed
etc.
Hope this helped. Let me know if you need more assistance.