Use 2020 iMac as primary display for Mac Studio?

I have a mac studio without any display and a 2020 iMac. I would like to use the iMac (or even some other macbook) as the primary display for the mac studio. As far as I searched, the possible option is using either the AirPlay or some other software which does not seem to outperform AirPlay. But it looks like I will run into the following issues since I don't possess a normal display for mac studio in the first place. - When I open the box of mac studio, I cannot even start it to initialize because the iMac screen will not work before setting up the mac studio properly. - Every time I start my mac studio, I guess some setting in it is necessary before the iMac screen works, which is then not possible. Any solutions or suggestions?