Learning macro is a lot like learning a foreign language. In the beginning you are happy to be able to use the simple things. A fly, a bee, a wasp are easily obtainable. Since you are using the 50mm lens, you aren't afraid to get close to the subject, which is a great start.
Shortly, however, you are going to hit the frustrating phase where you want to do more complicated things, in this case, take photos of smaller and smaller creatures. You've got good lenses so why not get a set of macro tubes? They are fairly cheap and will enable you to get incredible detail. It will be annoying for a few weeks while you get the hang of things but you will quickly master them.
Finally you get to the stage where you are totally fluent. You can control the camera and get the shots you want. This is the amazing moment you have dreamt of since you began taking macro. Minute creatures hardly anyone notices are at you disposal. Focus stacking which enables you to get the tiniest creatures totally in focus.
Macro is probably the most rewarding style of photography there is, as you are constantly pushing the camera, lens and yourself to the limit and, more often than not, going beyond the limit. It is not a style for the shutter counter as you need to be willing to take large numbers of shots for what is finally a small collection of photos. But doesn't it just make you feel great when you get it right?!!!!