Your camera picked these settings

Exposure Time: 1/400 sec
F-Number: f/4.0

Next time

Put your camera in AV mode. May be called Aperture Value. Set it to the lowest number. f2.8 in your case.

Zoom all the way in and half press the shutter while looking at your outstretched hand in the same lighting your subject, the flower in this case, is in. Remember what those settings are. Try to only see your hand in the viewfinder. Any flat colored object will work for this, I just always use my hand when I need a quick light reading on the run.

Put your camera in manual mode

Set your exposure time (TV) and F-Number (AV) to whatever the reading was in automatic mode.

Now, keeping your lens zoomed back up until the picture includes all that you do want and cuts out everything you don't. Then back up just a bit more and take the picture with the focus being on your subject.

That's a pretty basic set up for a shot like that. It will blur the background out and expose the flower perfectly. Depending on the time of day the background will be super bright from the sun, the same as the flower or much darker.

Different times of day and times of year, even weather will introduce different colors and types of shadows.

In the fall I can get gold lit shots that I just can't get any other time of year.

good luck!