WiFi wireless Bluetooth?

WiFi , wireless, , Bluetooth?
I like to replace three IR remote controls ("dumb" TV , Mac TV and "boom" bar ) with wireless.
Not looking for micro sized , portable devices, just something I can tinker with for starters.
Eventually would also like to "connect" the audio output to another speaker(s).

So what , if any , are the technical differences between "WiFi, wireless, Bluetooth"?

I gather that I can get "Internet dedicated " device or "headphone WiFi", and with USB, SPI or RS232 interfaces. ( SPI preferred, USB OK - using Due )

Can I just get non-dedicated Bluetooth to experiment with?

Thanks for your time.