there are a few ways to do it. You can make a circle a s a separate object then turn snaps on and cut into the panel where you want the inset to be. If you have snaps on the cut should be accurate. You can also do it with inset then bevel the verts on the corner. You can use booleans if you want but you usually have to do…
Booleans can cause some major problems as they tend to create very bad topology, topology you will end up needing to entirely rework if you're doing any sub-d work, so its generally faster to just model those sort of things by hand, than to boolean them. I wouldn't say never boolean, but for sub-d work they can definitely…