I upgraded from a wired Corsair mouse to a wireless Corsair mouse. I have a Mac Studio with limited USB ports. I have - an expensive - Plugable Thunderbolt dock/hub. I put the USB receiver on the hub, ...

A wireless Logitech mouse compatible with the Logitech Unifying Receiver can connect to any Unifying Receiver. You'll need Logitech's Unifying software to pair or un-pair a compatible wireless mouse.

but I hear that the Mouse is very heavy. In case I find the mouse unsuitable would it be possible for me to pair up another mouse with the same blue tooth transmitter, without having to use another ...

While the best laptops come with an efficient and responsive touchpad, they're rarely useful for gaming. What you need is a wireless mouse. To connect a wireless mouse to your laptop, you'll need to ...