I would like to update from Mojave to Catalina.
MAC is late 2012 and OS is Mojave 10.14.2
Update fails because SSD is not APFS.
I have read disk can be converted, using Disk Utility in recovery mode. Function to convert disk should be either in the edit menu or under a conversion button.
Unfortunately, I Can find neither edit menu nor conversion button.
The system is in recovery mode. There is a convert button which gets enabled selecting disk1, but the effect is different from what I expected, as shown



