I realize these are “first tries”. You mention using off camera flash. That’s good. I would recommend that you move it more off axis from the lens. You’ll get more modeling and avoid the glare on the front of your subject.
Also: A wireless setup can be useful. I use a transmitter on the hot shoe and a flash unit with a built-in receiver. Flashpoint (also marketed as Godox) is a pretty nice little rig. You can add a second unit for back-lighting or additional modeling. With macro you don’t need a lot of power because of the relatively short working distance.
These images are decent close-up photos. To be a true macro-photograph, the image on the sensor must be the same size as the actual subject. This is known as 1:1 magnification. Your Canon 7D camera has an APS-C size sensor (22.3mm x 14.9mm), and your Canon 100mm macro captures 1:1 at about 5.9-inches Minimum Working Distance (lens front element to subject). This is also known as Minimum Focusing Distance (sensor to subject). If not at MFD, then your capture is a close-up photo. Read more here: http://www.uglyhedgehog.com/t-22447-1.html