I am thinking about buying a 3 or 5 diopter closeup filter so as to add on the top of a macro lens.

Would you do this or would you advise against it ? Do you think it's good to try, or it is not something to dig into ?

The context: I'm learning photography, it's obvious I'm totally into proxy and macro photography. I have two macro lens which I am learning with: Sigma 014 18-300mm F3.5-6.3 DC MACRO, and Canon EF 24-105mm f/3.5-5.6 IS STM (which I'm not completely sure it is really a macro dedicated lens indeed).

I got pleasing results but I wanted even much more details. Extension tubes did add more details and now I'm looking forward having even more details. 

So I am considering adding a +3D or +5D closeup filter so as to be able to catch more details.

In a nutshell, so as to paraphrase my question: would you try a setup consisting of extension tube + low budget macro lens + closeup filter ? Or do you think there is something wrong in my approach ?