[RogerTheCat]

One of the basic rules when photographing wildlife or people is to get the eyes sharp even if other areas are out of focus. In the second picture you have achieved the equivalent of this by getting the back of the head in focus and taken a picture I quite like. On the first picture the focus area is around the front leg and the front of the leaf and so this part of the photograph is sharp. Ideally the focus should have been on the eyes. If you camera shows the focus point through the eyepiece try and line it up with the eyes when you take a shot which is something I always try and do.

DOf is always a problem with macro photography. You could try using a higher ISO setting to allow smaller shutter aperture but the trade off with this is that higher ISO may lead to noise. Another option is the use of a tripod or monopod to stabilise the camera so you can get away with lower shutter speeds

Also have a play around at home with camera. When I get my macro lens I took multiple photographs of various static objects in the house altering ISO, aperture, shutter speeds and focus point to so what happened. By doing that you get an idea of what settings to use when out in the field.

Finally there is no substitute for practice.