So, for the cut, you need a vector line around the whole thing. Obviously software is the way to go, but if you don’t have it, you could draw the line on a piece of paper and scan it in via the GF. I believe there is also a file in the Free files section with various shapes. You can load that up and just change the size of the rectangle to suit (change the rest of the shapes to “ignore”).
Found it: Cut Shapes Template
As for the deeper engrave, you could do a second run with faster settings, maybe less power (just alter the PG settings). Just make sure not to move the piece after the first run so it stays lined up.