Raspberry Pi 4 Bluetooth

Hey Little bird team,
Have very recently purchased pi 4 starter kit with included white wireless keyboard and mouse.

Assembled kit, batteries in accessories, installed raspbian os from sd card. Have configured wifi and been using wired mouse and keyboard so far.

When trying to connect/pair bluetooth accessories, I am able to identify that there are a few devices available when using ‘add a new device’ but every attempt that I have made to connect/pair so far has failed-either a timeout error msg or authentication failed.

I tried these steps for rpi3 but reached error msgs.

Do I need to update/upgrade via terminal commands first or something? What am I doing wrong?

Thank you!

What error messages were received?