Welcome to the community!
I suggest reading back through this topic to see what has worked well for others. For one thing, I would have put the Ikea repeater and your Google Home aside for a while until you had the blinds working with Hubitat. The repeater is simply a Zigbee repeater and it doesn't need to be part of your install unless you don't already have strong Zigbee in the area of the blinds. Google Home is just layering on a complication.
When you say "button" are you talking about the up/down button that came with the blinds? That won't be part of your install either. If you choose to integrate the blinds with Hubitat, you won't be able to use that button for anything.
Can you control the blinds from the Hubitat device page?
