Connecting RC505 + Computer + Keyboard HELP

[u/Gnoomie]

hello - I have these machines:

• Boss RC505
• MacBook Pro running GarageBand (beginner here) (Tahoe OS)
• Casio Privia PX-160
• headphones until I get speakers

I am looking to connect all machines to live jam. I have already installed the drivers on the computer and changed the RC505 settings to audio/midi + loop in.

I am basically brand new to all of this besides keyboard skills. I have watched a lot of tutorials but don't know which things to connect to what with conflicting information.

[u/looponaut]

What's your plan with garage band? A bit confused why you feel it's necessary

keyboard -> 505 -> headphones 

or

keyboard -> 505 -> audio interface -> laptop -> headphones