I modeled this entirely on blender, with the idea to have it printer already assembled and with NO supports. Testing this print right now as I'm writing.
Aim is to give a toddler something to play with which is not a real door of a real drawer ;)

Aaaand I did it :)
You have to bury the object about 0.3mm under the printing bed so the ring starts on the first layer instead of the second, and gets most adhesion.
Printed it with no supports and no brim, even if the latter would surely help for the ring.
Also a tip if you go with the no supports route: have the infill print BEFORE the walls, I went the other way around and as you can see a lot of material dripped down not having anything to grip onto.